Include libext2_quota.so if present for e2fsprogs utilities

Needed starting in 5.0 lollipop for e2fsck, mke2fs, and tune2fs
binaries.

Change-Id: Ie76517df4690f6407cb63d0607c6c0c8a77975e5
diff --git a/prebuilt/Android.mk b/prebuilt/Android.mk
index c69e07c..5e78a73 100644
--- a/prebuilt/Android.mk
+++ b/prebuilt/Android.mk
@@ -47,6 +47,9 @@
 RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libext2fs.so
 RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libext2_profile.so
 RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libext2_uuid.so
+ifneq ($(wildcard external/e2fsprogs/lib/quota/Android.mk),)
+    RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libext2_quota.so
+endif
 RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libpng.so
 RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/liblog.so
 RELINK_SOURCE_FILES += $(TARGET_OUT_SHARED_LIBRARIES)/libm.so