Allow traversal into /storage paths.

Apps are no longer required to have sdcard_r or sdcard_rw to access
some parts of external storage.  Relax the mount parameters to allow
everyone to traverse.

Bug: 10577808
Change-Id: I620c8f02f08b149437dfa5705e05a27b6994d2db
diff --git a/vm/Init.cpp b/vm/Init.cpp
index 2c81f67..f1762c9 100644
--- a/vm/Init.cpp
+++ b/vm/Init.cpp
@@ -1708,7 +1708,7 @@
     const char* target_base = getenv("EMULATED_STORAGE_TARGET");
     if (target_base != NULL) {
         if (mount("tmpfs", target_base, "tmpfs", MS_NOSUID | MS_NODEV,
-                "uid=0,gid=1028,mode=0050") == -1) {
+                "uid=0,gid=1028,mode=0751") == -1) {
             SLOGE("Failed to mount tmpfs to %s: %s", target_base, strerror(errno));
             return -1;
         }