gitk: Makefile/install: force permissions when installing files and dirs

The msg-files msgs/*.msg used to be installed with mode 755 although
they're not executables.  With this commit, files are forced to be
installed with mode 644, directories and executables with mode 755.

Signed-off-by: Paul Mackerras <paulus@samba.org>

Makefile

@@ -40,9 +40,9 @@ endif
 all:: gitk-wish $(ALL_MSGFILES)
 
 install:: all
-	$(INSTALL) gitk-wish '$(DESTDIR_SQ)$(bindir_SQ)'/gitk
-	$(INSTALL) -d '$(DESTDIR_SQ)$(msgsdir_SQ)'
-	$(foreach p,$(ALL_MSGFILES), $(INSTALL) $p '$(DESTDIR_SQ)$(msgsdir_SQ)' &&) true
+	$(INSTALL) -m 755 gitk-wish '$(DESTDIR_SQ)$(bindir_SQ)'/gitk
+	$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(msgsdir_SQ)'
+	$(foreach p,$(ALL_MSGFILES), $(INSTALL) -m 644 $p '$(DESTDIR_SQ)$(msgsdir_SQ)' &&) true
 
 uninstall::
 	$(foreach p,$(ALL_MSGFILES), $(RM) '$(DESTDIR_SQ)$(msgsdir_SQ)'/$(notdir $p) &&) true