Git module: fix for relative paths

If a relative path is passed as an argument, this change first
converts it to an absolute path.

This fixes a bug where the git module would attempt to chdir into an
invalid directory because of multiple chdir calls against a relative
path.

library/git

@@ -225,7 +225,7 @@ def main():
         )
     )
 
-    dest    = os.path.expanduser(module.params['dest'])
+    dest    = os.path.abspath(os.path.expanduser(module.params['dest']))
     repo    = module.params['repo']
     version = module.params['version']
     remote  = module.params['remote']