re PR ada/15479 (Ada manual problems)

gcc/ada/
	PR documentation/15479
	* gnat-style.texi: Remove AdaCore copyright statement and GPL
	statement for GNAT.  Add @copying stanza, use it.  Update to
	GFDL 1.2.  Do not list GFDL as Invariant Section, do not list
	title as Front-Cover Text.
	* gnat_rm.texi: Likewise.
	* gnat_ugn.texi: Likewise.

gcc/
	* doc/cpp.texi: Update to GFDL 1.2.
	* doc/gcc.texi: Do not list GPL as Invariant Section.
	* doc/gccint.texi: Likewise.  Update copyright years.
	* doc/install.texi: Update copyright years.

gcc/fortran/
	* gfc-internals.texi: Update to GFDL 1.2.  Do not list GPL as
	Invariant Section.
	* gfortran.texi: Likewise.
	* intrinsic.texi: Do not list GPL as Invariant Section.
	* invoke.texi: Likewise.  Update copyright years.

gcc/java/
	* gcj.texi: Update copyright years.  Do not list GPL as
	Invariant Section.

libgomp/
	* libgomp.texi: Update to GFDL 1.2.  Update copyright years.
	Do not list GPL as Invariant Section.

From-SVN: r138293