Don't set executable bits on non-script Python files

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@53328 15284696-431f-4ddb-bdfa-cd5b030d7da7

tools/g.html2man/Makefile

@@ -6,5 +6,8 @@ TARGETS := $(patsubst %.py,$(TOOLSDIR)/%.py,html.py groff.py g.html2man.py)
 
 default: $(TARGETS)
 
-$(TOOLSDIR)/%.py: %.py
+$(TOOLSDIR)/g.html2man.py: g.html2man.py
 	$(INSTALL) $< $@
+
+$(TOOLSDIR)/%.py: %.py
+	$(INSTALL_DATA) $< $@