libfec: Update the header path for ext4_utils.

Test: mmma system/extras/libfec

Change-Id: I28b71419019c3bb0873b159e178cdfcfb5d89922
(cherry picked from commit 7f46e03817817320149ee94b639eab4635566e12)
diff --git a/libfec/fec_open.cpp b/libfec/fec_open.cpp
index caec370..45e0c26 100644
--- a/libfec/fec_open.cpp
+++ b/libfec/fec_open.cpp
@@ -18,9 +18,10 @@
 #include <sys/ioctl.h>
 #include <sys/stat.h>
 
+#include <ext4_utils/ext4_sb.h>
+
 extern "C" {
     #include <squashfs_utils.h>
-    #include <ext4_sb.h>
 }
 
 #if defined(__linux__)