Zero-pad (instead of space-pad) the day of month in GIT_DATE

This is not consistent with __DATE__ macro expansion, but I like it better

Heck, now that we're not really logging the build date much of anywhere, we
could go with any other more sensible date format here.

src/build/gitinfo.bat

 @git log -1 HEAD --format="#define GIT_HASH \"%%h\"" > git_hash.h
-@git log -1 HEAD --format="#define GIT_DATE \"%%cd\"" "--date=format-local:%%b %%e %%Y %%H:%%M" >> git_hash.h
+@git log -1 HEAD --format="#define GIT_DATE \"%%cd\"" "--date=format-local:%%b %%d %%Y %%H:%%M" >> git_hash.h
 @echo #define GIT_BRANCH ^"| tr -d "\r\n" > git_branch.h
 @git rev-parse --abbrev-ref HEAD | tr -d "\n" >> git_branch.h
 @echo ^" >> git_branch.h

src/sbbs3/targets.mk

@@ -158,7 +158,7 @@ FORCE:
 ifneq ($(GIT), NO)
 git_hash.h: FORCE ../../.git
 	$(QUIET)git log -1 HEAD --format="#define GIT_HASH \"%h\"" > $@.tmp
-	$(QUIET)git log -1 HEAD --format="#define GIT_DATE \"%cd\"" '--date=format-local:%b %e %Y %H:%M' >> $@.tmp
+	$(QUIET)git log -1 HEAD --format="#define GIT_DATE \"%cd\"" '--date=format-local:%b %d %Y %H:%M' >> $@.tmp
 	$(QUIET)test -e $@ && diff $@.tmp $@ || cp $@.tmp $@
 	$(QUIET)rm -f $@.tmp