Include liblog in fs_mgr to fix the build.

A recent change to how libcutils is built requires liblog
to be explicitly included in the link list if it's needed.

Change-Id: I8547f5e65c488c8f6e314ccd4eb96606742272be
diff --git a/fs_mgr/Android.mk b/fs_mgr/Android.mk
index 0ce07c1..782ae99 100644
--- a/fs_mgr/Android.mk
+++ b/fs_mgr/Android.mk
@@ -28,7 +28,7 @@
 LOCAL_MODULE_PATH := $(TARGET_ROOT_OUT)/sbin
 LOCAL_UNSTRIPPED_PATH := $(TARGET_ROOT_OUT_UNSTRIPPED)
 
-LOCAL_STATIC_LIBRARIES := libfs_mgr liblogwrap libcutils libc
+LOCAL_STATIC_LIBRARIES := libfs_mgr liblogwrap libcutils liblog libc
 
 include $(BUILD_EXECUTABLE)