ipacm: Address ipacm start failure

 * ipacm pid file is stored at /data/vendor/ipa/ipacm.pid, and the
   service fails to start if the directory is not accessible.
 * QCOM uses ipacm-diag.rc to create the directory. Replicate the
   behavior since we don't necessarily ship that one.

Change-Id: I5663e32d202cd8b52de8e8257332be1029c0fe3d
diff --git a/ipacm/src/ipacm.rc b/ipacm/src/ipacm.rc
index 6b3bf98..78b3340 100644
--- a/ipacm/src/ipacm.rc
+++ b/ipacm/src/ipacm.rc
@@ -30,5 +30,8 @@
     user radio
     group radio inet
 
+# msm specific files that need to be created on /data
 on post-fs-data
+    mkdir /data/vendor/ipa 0770 radio radio
+    chmod 0770 /data/vendor/ipa
     start vendor.ipacm