Rename libexfat target to prevent conflicts

Change-Id: I5d2774c273a90c1f02c074f3c947c13b265972b3
diff --git a/exfat/libexfat/Android.mk b/exfat/libexfat/Android.mk
index 39a7faa..a280abb 100644
--- a/exfat/libexfat/Android.mk
+++ b/exfat/libexfat/Android.mk
@@ -2,7 +2,7 @@
 
 include $(CLEAR_VARS)
 
-LOCAL_MODULE := libexfat
+LOCAL_MODULE := libexfat_twrp
 LOCAL_MODULE_TAGS := optional
 LOCAL_CFLAGS = -D_FILE_OFFSET_BITS=64
 LOCAL_SRC_FILES = cluster.c io.c log.c lookup.c mount.c node.c time.c utf.c utils.c