* gcc.c (do_spec_1): Add new %B operator.
	(set_input): Prepare for %B.

	(link_command_spec): Move up with the other tm.h-
	overrideable specs.  Factor out the portion conditional on
	LINK_LIBGCC_SPECIAL into a new spec, %(link_libgcc).
	(struct compiler): Just have a single spec string.  All users
	updated.
	(default_compilers): Remove unnecessary braces.
	(static_specs): Update.

	(trad_capable_cpp, cpp_options, cc1_options, asm_options): New
	named specs.
	(C and assembly specs): Use the new named specs, as appropriate.

	* objc/lang-specs.h, ch/lang-specs.h, cp/lang-specs.h,
	f/lang-specs.h, java/lang-specs.h: Use the new named specs.
	Remove unnecessary braces.

From-SVN: r35008