sphinx: jit: port libgccjit to shared Sphinx

gcc/jit/ChangeLog:

	* Make-lang.in:
	* docs/cp/index.rst: Moved to...
	* doc/cp/index.rst: ...here.
	* docs/cp/intro/index.rst: Moved to...
	* doc/cp/intro/index.rst: ...here.
	* docs/cp/intro/tutorial01.rst: Moved to...
	* doc/cp/intro/tutorial01.rst: ...here.
	* docs/cp/intro/tutorial02.rst: Moved to...
	* doc/cp/intro/tutorial02.rst: ...here.
	* docs/cp/intro/tutorial03.rst: Moved to...
	* doc/cp/intro/tutorial03.rst: ...here.
	* docs/cp/intro/tutorial04.rst: Moved to...
	* doc/cp/intro/tutorial04.rst: ...here.
	* docs/cp/topics/asm.rst: Moved to...
	* doc/cp/topics/asm.rst: ...here.
	* docs/cp/topics/compilation.rst: Moved to...
	* doc/cp/topics/compilation.rst: ...here.
	* docs/cp/topics/contexts.rst: Moved to...
	* doc/cp/topics/contexts.rst: ...here.
	* docs/cp/topics/expressions.rst: Moved to...
	* doc/cp/topics/expressions.rst: ...here.
	* docs/cp/topics/functions.rst: Moved to...
	* doc/cp/topics/functions.rst: ...here.
	* docs/cp/topics/index.rst: Moved to...
	* doc/cp/topics/index.rst: ...here.
	* docs/cp/topics/locations.rst: Moved to...
	* doc/cp/topics/locations.rst: ...here.
	* docs/cp/topics/objects.rst: Moved to...
	* doc/cp/topics/objects.rst: ...here.
	* docs/cp/topics/types.rst: Moved to...
	* doc/cp/topics/types.rst: ...here.
	* docs/examples/emit-alphabet.bf: Moved to...
	* doc/examples/emit-alphabet.bf: ...here.
	* docs/examples/tut01-hello-world.c: Moved to...
	* doc/examples/tut01-hello-world.c: ...here.
	* docs/examples/tut01-hello-world.cc: Moved to...
	* doc/examples/tut01-hello-world.cc: ...here.
	* docs/examples/tut02-square.c: Moved to...
	* doc/examples/tut02-square.c: ...here.
	* docs/examples/tut02-square.cc: Moved to...
	* doc/examples/tut02-square.cc: ...here.
	* docs/examples/tut03-sum-of-squares.c: Moved to...
	* doc/examples/tut03-sum-of-squares.c: ...here.
	* docs/examples/tut03-sum-of-squares.cc: Moved to...
	* doc/examples/tut03-sum-of-squares.cc: ...here.
	* docs/examples/tut04-toyvm/Makefile: Moved to...
	* doc/examples/tut04-toyvm/Makefile: ...here.
	* docs/examples/tut04-toyvm/factorial.toy: Moved to...
	* doc/examples/tut04-toyvm/factorial.toy: ...here.
	* docs/examples/tut04-toyvm/fibonacci.toy: Moved to...
	* doc/examples/tut04-toyvm/fibonacci.toy: ...here.
	* docs/examples/tut04-toyvm/toyvm.c: Moved to...
	* doc/examples/tut04-toyvm/toyvm.c: ...here.
	* docs/examples/tut04-toyvm/toyvm.cc: Moved to...
	* doc/examples/tut04-toyvm/toyvm.cc: ...here.
	* docs/examples/tut05-bf.c: Moved to...
	* doc/examples/tut05-bf.c: ...here.
	* docs/index.rst: Moved to...
	* doc/index.rst: ...here.
	* docs/internals/index.rst: Moved to...
	* doc/internals/index.rst: ...here.
	* docs/internals/test-hello-world.exe.log.txt: Moved to...
	* doc/internals/test-hello-world.exe.log.txt: ...here.
	* docs/_build/texinfo/libgccjit-figures/factorial.png: Moved to...
	* doc/intro/factorial.png: ...here.
	* docs/intro/index.rst: Moved to...
	* doc/intro/index.rst: ...here.
	* docs/_build/texinfo/libgccjit-figures/sum-of-squares.png: Moved to...
	* doc/intro/sum-of-squares.png: ...here.
	* docs/intro/tutorial01.rst: Moved to...
	* doc/intro/tutorial01.rst: ...here.
	* docs/intro/tutorial02.rst: Moved to...
	* doc/intro/tutorial02.rst: ...here.
	* docs/intro/tutorial03.rst: Moved to...
	* doc/intro/tutorial03.rst: ...here.
	* docs/intro/tutorial04.rst: Moved to...
	* doc/intro/tutorial04.rst: ...here.
	* docs/intro/tutorial05.rst: Moved to...
	* doc/intro/tutorial05.rst: ...here.
	* docs/topics/asm.rst: Moved to...
	* doc/topics/asm.rst: ...here.
	* docs/topics/compatibility.rst: Moved to...
	* doc/topics/compatibility.rst: ...here.
	* docs/topics/compilation.rst: Moved to...
	* doc/topics/compilation.rst: ...here.
	* docs/topics/contexts.rst: Moved to...
	* doc/topics/contexts.rst: ...here.
	* docs/topics/expressions.rst: Moved to...
	* doc/topics/expressions.rst: ...here.
	* docs/topics/function-pointers.rst: Moved to...
	* doc/topics/function-pointers.rst: ...here.
	* docs/topics/functions.rst: Moved to...
	* doc/topics/functions.rst: ...here.
	* docs/topics/index.rst: Moved to...
	* doc/topics/index.rst: ...here.
	* docs/topics/locations.rst: Moved to...
	* doc/topics/locations.rst: ...here.
	* docs/topics/objects.rst: Moved to...
	* doc/topics/objects.rst: ...here.
	* docs/topics/performance.rst: Moved to...
	* doc/topics/performance.rst: ...here.
	* docs/topics/types.rst: Moved to...
	* doc/topics/types.rst: ...here.
	* docs/Makefile: Removed.
	* docs/_build/texinfo/Makefile: Removed.
	* docs/_build/texinfo/libgccjit-figures/factorial1.png: Removed.
	* docs/_build/texinfo/libgccjit-figures/sum-of-squares1.png: Removed.
	* docs/_build/texinfo/libgccjit.texi: Removed.
	* docs/conf.py: Removed.
	* docs/intro/factorial.png: Removed.
	* docs/intro/sum-of-squares.png: Removed.
	* doc/conf.py: New file.