Add read-only markers to generated gdb/regformats/ .dat files

Add read-only markers to generated gdb/regformats/ .dat files

We have read-only markers in most generated sources already, so that
Emacs/Vi users won't edit them accidentally, but were missing them on
the generated gdb/regformats/ .dat files.

gdb/
2014-10-01  Pedro Alves  <palves@redhat.com>

	* features/Makefile ($(outdir)/%.dat): Output "THIS FILE IS
	GENERATED" along with emacs/vi read-only markers.
	* regformats/aarch64.dat: Regenerate.
	* regformats/arm-with-iwmmxt.dat: Regenerate.
	* regformats/arm-with-neon.dat: Regenerate.
	* regformats/arm-with-vfpv2.dat: Regenerate.
	* regformats/arm-with-vfpv3.dat: Regenerate.
	* regformats/i386/amd64-avx-linux.dat: Regenerate.
	* regformats/i386/amd64-avx.dat: Regenerate.
	* regformats/i386/amd64-avx512-linux.dat: Regenerate.
	* regformats/i386/amd64-avx512.dat: Regenerate.
	* regformats/i386/amd64-linux.dat: Regenerate.
	* regformats/i386/amd64-mpx-linux.dat: Regenerate.
	* regformats/i386/amd64-mpx.dat: Regenerate.
	* regformats/i386/amd64.dat: Regenerate.
	* regformats/i386/i386-avx-linux.dat: Regenerate.
	* regformats/i386/i386-avx.dat: Regenerate.
	* regformats/i386/i386-avx512-linux.dat: Regenerate.
	* regformats/i386/i386-avx512.dat: Regenerate.
	* regformats/i386/i386-linux.dat: Regenerate.
	* regformats/i386/i386-mmx-linux.dat: Regenerate.
	* regformats/i386/i386-mmx.dat: Regenerate.
	* regformats/i386/i386-mpx-linux.dat: Regenerate.
	* regformats/i386/i386-mpx.dat: Regenerate.
	* regformats/i386/i386.dat: Regenerate.
	* regformats/i386/x32-avx-linux.dat: Regenerate.
	* regformats/i386/x32-avx.dat: Regenerate.
	* regformats/i386/x32-avx512-linux.dat: Regenerate.
	* regformats/i386/x32-avx512.dat: Regenerate.
	* regformats/i386/x32-linux.dat: Regenerate.
	* regformats/i386/x32.dat: Regenerate.
	* regformats/microblaze-with-stack-protect.dat: Regenerate.
	* regformats/mips-dsp-linux.dat: Regenerate.
	* regformats/mips-linux.dat: Regenerate.
	* regformats/mips64-dsp-linux.dat: Regenerate.
	* regformats/mips64-linux.dat: Regenerate.
	* regformats/nios2-linux.dat: Regenerate.
	* regformats/rs6000/powerpc-32.dat: Regenerate.
	* regformats/rs6000/powerpc-32l.dat: Regenerate.
	* regformats/rs6000/powerpc-64l.dat: Regenerate.
	* regformats/rs6000/powerpc-altivec32l.dat: Regenerate.
	* regformats/rs6000/powerpc-altivec64l.dat: Regenerate.
	* regformats/rs6000/powerpc-cell32l.dat: Regenerate.
	* regformats/rs6000/powerpc-cell64l.dat: Regenerate.
	* regformats/rs6000/powerpc-e500l.dat: Regenerate.
	* regformats/rs6000/powerpc-vsx32l.dat: Regenerate.
	* regformats/rs6000/powerpc-vsx64l.dat: Regenerate.
	* regformats/s390-linux32.dat: Regenerate.
	* regformats/s390-linux32v1.dat: Regenerate.
	* regformats/s390-linux32v2.dat: Regenerate.
	* regformats/s390-linux64.dat: Regenerate.
	* regformats/s390-linux64v1.dat: Regenerate.
	* regformats/s390-linux64v2.dat: Regenerate.
	* regformats/s390-te-linux64.dat: Regenerate.
	* regformats/s390x-linux64.dat: Regenerate.
	* regformats/s390x-linux64v1.dat: Regenerate.
	* regformats/s390x-linux64v2.dat: Regenerate.
	* regformats/s390x-te-linux64.dat: Regenerate.
	* regformats/tic6x-c62x-linux.dat: Regenerate.
	* regformats/tic6x-c62x.dat: Regenerate.
	* regformats/tic6x-c64x-linux.dat: Regenerate.
	* regformats/tic6x-c64x.dat: Regenerate.
	* regformats/tic6x-c64xp-linux.dat: Regenerate.
	* regformats/tic6x-c64xp.dat: Regenerate.