Android: Add mount points for Bionic

Bionic links against libraries that aren't in the default mount
points, so init won't start.

Signed-off-by: Fuad Tabba <tabba@google.com>
diff --git a/builtin-setup.c b/builtin-setup.c
index 27b6419..126e819 100644
--- a/builtin-setup.c
+++ b/builtin-setup.c
@@ -113,10 +113,12 @@
 };
 
 static const char *guestfs_symlinks[] = {
+	"/apex",
 	"/bin",
 	"/lib",
 	"/lib64",
 	"/sbin",
+	"/system",
 	"/usr",
 	"/etc/ld.so.conf",
 };