c-opts.c (lang_flags): Update for new spelling of flags.

c-opts.c (lang_flags): Update for new spelling of flags.

	* c-opts.c (lang_flags): Update for new spelling of flags.
	(write_langs): Similarly.
	* c.opt: Specify languages.
	* opts.h: Remove languages.
	* opts.sh: Recognise front-end defined languages.
ada:
	* lang.opt: Declare Ada.
	* misc.c (gnat_init_options): Update.
doc:
	* sourcebuild.texi: Update.
f:
	* lang.opt: Declare F77.
java:
	* lang.opt: Declare Java.
	* lang.c (java_init_options): Update.
treelang:
	* lang.opt: Declare Treelang.  Update.
	* tree1.c (treelang_init_options): Update.

From-SVN: r67976