[iOS] upload script to handle ios playground unit test (#11)

diff --git a/ios/update_podfile_for_travisci.sh b/ios/update_podfile_for_travisci.sh
new file mode 100644
index 0000000..46bea28
--- /dev/null
+++ b/ios/update_podfile_for_travisci.sh
@@ -0,0 +1,5 @@
+#!/bin/bash
+if  grep -q 'submodule "weex-playground"' "../../.gitmodules"; then
+    sed -i -e '7,10d;12d' Podfile
+    rm Podfile-e
+fi