libgomp.exp: Load torture-options.exp from gcc lib.

libgomp:
	* testsuite/lib/libgomp.exp: Load torture-options.exp from gcc lib.

gcc/doc:
	* doc/sourcebuild.texi: Document support for torture tests.

gcc/testsuite:
	* lib/torture-options.exp: New support for torture options.
	* lib/gfortran-dg.exp (gfortran-dg-runtest): Use new torture
	procs.
	* lib/c-torture.exp: Define C_TORTURE_OPTIONS instead of
	TORTURE_OPTIONS; don't define torture_with_loops and
	torture_without_loops.
	* lib/gcc-dg.exp: Define DG_TORTURE_OPTIONS instead of
	TORTURE_OPTIONS; don't define torture_with_loops and
	torture_without_loops.
	(gcc-dg-runtest): Use new torture procs if no torture options
	defined.
	* lib/fortran-torture.exp: Define FORTRAN_TORTURE_OPTIONS instead of
	TORTURE_OPTIONS.
	(fortran-torture-execute): Use torture_with_loops instead of
	TORTURE_OPTIONS.
	(fortran-torture): Ditto.
	* lib/objc-torture.exp: Define OBJC_TORTURE_OPTIONS instead of
	TORTURE_OPTIONS; don't define torture_with_loops and
	torture_without_loops.
	* gcc.c-torture/execute/execute.exp: Use new torture procs.
	* gcc.c-torture/execute/builtins/builtins.exp: Ditto.
	* gcc.c-torture/execute/ieee/ieee.exp: Ditto.
	* gcc.c-torture/unsorted/unsorted.exp: Ditto.
	* gfortran.fortran-torture/execute/execute.exp: Ditto.
	* gfortran.fortran-torture/compile/compile.exp: Ditto.
	* gcc.target/x86_64/abi/abi-x86_64.exp: Ditto.
	* gcc.target/i386/math-torture/math-torture.exp: Define
	MATH_TORTURE_OPTIONS, use new torture procs.
	* gcc.dg/pch/pch.exp: Use new torture procs.
	* gcc.dg/format/format.exp: Ditto.
	* gcc.misc-tests/i386-prefetch.exp: Ditto.
	* gcc.misc-tests/dectest.exp: Ditto.
	* objc.dg/pch/pch.exp: Ditto.
	* objc/execute/execute.exp: Ditto.
	* objc/execute/exceptions/exceptions.exp: Ditto.
	* objc/compile/compile.exp: Ditto.

From-SVN: r135381