gst-uninstalled: Don't change current working directory

Currently gst-uninstalled.py changes the current directory to the root
of the gst-build before executing execute the command passed as
arguments. This is unnecessary, it creates confusion and makes scripting
more cumbersome. This patch fixes that.

gst-uninstalled.py

@@ -221,7 +221,7 @@ if __name__ == "__main__":
                 args.append("--rcfile")
                 args.append(tmprc.name)
     try:
-        exit(subprocess.call(args, cwd=options.srcdir, close_fds=False,
+        exit(subprocess.call(args, close_fds=False,
                              env=get_subprocess_env(options, gst_version)))
     except subprocess.CalledProcessError as e:
         exit(e.returncode)