Make git_hash.h and git_branch.h dependencies of all

To be sure these buggers are always created for every build that includes the
'all' target. Perhaps these should be creatd in build or an output dir and
maybe for all projects (not just sbbs3) - but will ponder tomorrow.

src/sbbs3/targets.mk

@@ -51,7 +51,7 @@ UTILS		= $(FIXSMB) $(CHKSMB) \
 			  $(SEXYZ) $(DSTSEDIT) $(READSAUCE) $(SHOWSTAT) \
 			  $(PKTDUMP) $(FMSGDUMP)
 
-all:	dlls utils console scfg uedit umonitor
+all:	git_hash.h git_branch.h dlls utils console scfg uedit umonitor
 
 console:	$(JS_DEPS) xpdev-mt smblib \
 		$(MTOBJODIR) $(LIBODIR) $(EXEODIR) \