* common.opt: Remove -fgnu-linker.
	* flags.h: Remove flag_gnu_linker.
	* opts.c: Don't handle OPT_fgnu_linker.
	* toplev.c: Don't initialize flag_gnu_linker.
	Remove gnu-linker entry from f_options.
	* config/dsp16xx/dsp16xx.h (OPTIMIZATION_OPTIONS):
	Don't reset flag_gnu_linker.
	* config/mips/mips.c (override_options): Likewise.
	* doc/invoke.texi: Remove all mention of -fgnu-linker.

From-SVN: r74117