Fix permissions for /data/preloads

Default permission bits are 771. It causes permission denied errors when
MediaProvider tries to scan /data/preloads. We have to allow read for others.

Bug: 29940807
Change-Id: I45645cf1154501ccb64bef08b9ad7bf7709dfd8e
diff --git a/libcutils/fs_config.c b/libcutils/fs_config.c
index 08db7dc..9acfa58 100644
--- a/libcutils/fs_config.c
+++ b/libcutils/fs_config.c
@@ -91,6 +91,7 @@
     { 00775, AID_MEDIA_RW, AID_MEDIA_RW, 0, "data/media/Music" },
     { 00750, AID_ROOT,   AID_SHELL,  0, "data/nativetest" },
     { 00750, AID_ROOT,   AID_SHELL,  0, "data/nativetest64" },
+    { 00775, AID_ROOT,   AID_ROOT,   0, "data/preloads" },
     { 00771, AID_SYSTEM, AID_SYSTEM, 0, "data" },
     { 00755, AID_ROOT,   AID_SYSTEM, 0, "mnt" },
     { 00755, AID_ROOT,   AID_ROOT,   0, "root" },