Codesign the executable on recene MacOS systems

* src/Makefile.in (temacs$(EXEEXT)): Codesign the executable on
recent (ARM) MacOS systems (bug#43878).  Without this, building
Emacs fails.

Copyright-paperwork-exempt: yes

src/Makefile.in

@@ -336,6 +336,10 @@ DUMPING=@DUMPING@
 CHECK_STRUCTS = @CHECK_STRUCTS@
 HAVE_PDUMPER = @HAVE_PDUMPER@
 
+## ARM Macs require that all code have a valid signature.  Since pump
+## invalidates the signature, we must re-sign to fix it.
+DO_CODESIGN=$(patsubst aarch64-apple-darwin%,yes,@configuration@)
+
 # 'make' verbosity.
 AM_DEFAULT_VERBOSITY = @AM_DEFAULT_VERBOSITY@
 
@@ -653,6 +657,9 @@ temacs$(EXEEXT): $(LIBXMENU) $(ALLOBJS) $(LIBEGNU_ARCHIVE) $(EMACSRES) \
 	  $(ALLOBJS) $(LIBEGNU_ARCHIVE) $(W32_RES_LINK) $(LIBES)
 ifeq ($(HAVE_PDUMPER),yes)
 	$(AM_V_at)$(MAKE_PDUMPER_FINGERPRINT) $@.tmp
+ifeq ($(DO_CODESIGN),yes)
+	codesign -s - -f $@.tmp
+endif
 endif
 	$(AM_V_at)mv $@.tmp $@
 	$(MKDIR_P) $(etc)