Makefile.
Ensure that a patch to convert.sh applies cleanly by diff'ing against a
clean copy of the original file.
Also, strip the DOS-style \r\n line-terminators on cpu.c before building,
so that ordinary cpp line continuations work properly.
Fixes a problem shown up on latest 1.5.2 bulk build.
first component is now a package name+version/pattern, no more
executable/patchname/whatnot.
While there, introduce BUILD_USES_MSGFMT as shorthand to pull in
devel/gettext unless /usr/bin/msgfmt exists (i.e. on post-1.5 -current).
Patch by Alistair Crooks <agc@netbsd.org>
