Makefile: learn to generate listings for targets requiring special flags
Makefile: learn to generate listings for targets requiring special flags

'make git.s' to debug code generation of main() fails because
git.c makes use of preprocessor symbols such as GIT_VERSION that
are not set.  make does not generate code listings for
builtin_help.c, exec_cmd.c, builtin-init-db.c, config.c, http.c,
or http-walker.c either, for the same reason.

So pass the flags used to generate each .o file when generating
the corresponding assembler listing.

Acked-by: Linus Torvalds <69652caca27c8b940640ad396ab71f93cacec34f@linux-foundation.org>
Signed-off-by: Jonathan Nieder <b57189c5f2fd5b3daf3350a77fde90def1080fa5@gmail.com>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git