bug#11548: Mac Intel/PowerPC doesn't build due to recent commit

[David Caldwell <david@porkrind.org>]

On Mac OS X x86_64:
make  all-am
gcc -mmacosx-version-min=10.5 -std=gnu99 -DHAVE_CONFIG_H -I. -I../src
-I/Users/david/src/emacs-dev/emacs-bzr/build-2012-05-23/src      -g -O2
-MT allocator.o -MD -MP -MF .deps/allocator.Tpo -c -o allocator.o
allocator.c
In file included from allocator.c:2:
../src/config.h:1352:26: error: m/amdx86-64.h: No such file or directory

Cross compiling PowerPC on Mac OS X:
powerpc-apple-darwin10-gcc-4.2.1 -mmacosx-version-min=10.4 -std=gnu99
-DHAVE_CONFIG_H -I. -I../src
-I/Users/david/src/emacs-dev/emacs-bzr/build-2012-05-23/src      -g -O2
-MT allocator.o -MD -MP -MF .deps/allocator.Tpo -c -o allocator.o
allocator.c
In file included from allocator.c:2:
../src/config.h:1352:26: error: m/macppc.h: No such file or directory

This appears to be related to this commit:

revno: 108341
committer: Paul Eggert <eggert@cs.ucla.edu>
branch nick: trunk
timestamp: Tue 2012-05-22 09:20:27 -0700
message:
  Remove src/m/*.


I'm not sure what the solution is, I'm just reporting that I can't build
on the Mac (PPC or Intel) any more.

-David