Generate _test.go only for _test.py files

Author: alanjds

tools/genmake

@@ -74,10 +74,11 @@ def main(args):
                  [os.path.join(dirpath, filename)],
                  ['grumpc -modname={} $< > $@'.format(modname)],
                  echo_debug=True)
-      _PrintRule(gotest_file,
-                 [os.path.join(dirpath, filename)],
-                 ['gentest -modname={} > $@'.format(modname)],
-                 echo_debug=True)
+      if modname.endswith('_test'):
+        _PrintRule(gotest_file,
+                   [os.path.join(dirpath, filename)],
+                   ['gentest -modname={} > $@'.format(modname)],
+                   echo_debug=True)
 
       recipe = (r"""pydeps -modname=%s $< | awk '{gsub(/\./, "/", $$0); """
                 r"""print "%s: %s/__python__/" $$0 ".a"}' > $@""")