[lldb] Avoid modifying the source tree in TestPlatformLaunchGDBServer

The test binary gets uploaded to the "remote" platform's working
directory which, by default is in the source tree. Change that.

Author: labath

lldb/test/API/commands/platform/launchgdbserver/TestPlatformLaunchGDBServer.py

@@ -91,6 +91,9 @@ def test_lldb_server_weird_symlinks(self):
 
         connect_url = "connect://[%s]:%s" % (hostname, socket_id)
         self.runCmd("platform connect %s" % connect_url)
+        wd = self.getBuildArtifact("wd")
+        self.assertSuccess(new_platform.MakeDirectory(wd))
+        new_platform.SetWorkingDirectory(wd)
         self.runCmd("target create {}".format(self.getBuildArtifact("a.out")))
         self.runCmd("run")
         self.expect(