Add gflags test

.gitmodules

@@ -16,3 +16,6 @@
 [submodule "test/integration/pycrypto"]
 	path = test/integration/pycrypto
 	url = https://github.com/dlitz/pycrypto.git
+[submodule "test/integration/gflags"]
+	path = test/integration/gflags
+	url = https://github.com/google/python-gflags

gflags @ 1569dd1f

+Subproject commit 1569dd1f3855abd262ea3a7741527d4413b35bc9

test/integration/gflags_test.py

+import glob
+import subprocess, sys, os
+
+gflags_dir = os.path.dirname(os.path.abspath(__file__)) + "/gflags"
+os.chdir(gflags_dir)
+
+env = os.environ
+env["PYTHONPATH"] = "."
+
+TESTS_DIR = "tests"
+for fn in glob.glob("%s/*.py" % TESTS_DIR):
+    # We don't support xml.dom.minidom yet
+    if "helpxml_test.py" in fn:
+        print "Skipping", fn
+        continue
+
+    print "Running", fn
+    subprocess.check_call([sys.executable, fn])
+
+print "-- Tests finished"