* makefile.MPW: Add dependencies for fringe.c.x, image.c.x, and

* makefile.MPW: Add dependencies for fringe.c.x, image.c.x, and
lastfile.c.x.
(PPCCOptions): Add -alloca.
(EmacsObjects): Remove alloca.c.x.  Add fringe.c.x, image.c.x, and
lastfile.c.x.
(Emacs MPW): Add QuickTimeLib.
(EmacsSource): Remove alloca.c.  Add fringe.c, image.c, and
lastfile.c.
(LispSource): Fix pathnames for byte-run.elc, float-sup.elc, and
map-ynp.elc.
* inc/config.h (USE_LSB_TAG) [__MRC__]: Define.
(UNEXEC_SRC): Close comment.
* inc/epaths.h (PATH_BITMAPS, PATH_GAME): New defines.
* inc/m-mac.h (HAVE_ALLOCA) [__MRC__]: Define.
(C_ALLOCA) [__MRC__]: Don't define.
* inc/s-mac.h (X_OK): New define.
(DECL_ALIGN) [USE_LSB_TAG && __MRC__]: New macro.
(GC_MARK_STACK): Define to GC_MAKE_GCPROS_NOOPS.