Update the header path for ext4_utils.

Test: `mmma system/core`

Change-Id: I6291d10d6c8d4972aeca55596baa83f555496193
diff --git a/fastboot/Android.mk b/fastboot/Android.mk
index 7112d1d..d69a81f 100644
--- a/fastboot/Android.mk
+++ b/fastboot/Android.mk
@@ -21,7 +21,6 @@
 LOCAL_C_INCLUDES := \
   $(LOCAL_PATH)/../adb \
   $(LOCAL_PATH)/../mkbootimg \
-  $(LOCAL_PATH)/../../extras/ext4_utils \
   $(LOCAL_PATH)/../../extras/f2fs_utils \
 
 LOCAL_SRC_FILES := \
diff --git a/fastboot/fs.cpp b/fastboot/fs.cpp
index 8539e23..9b73165 100644
--- a/fastboot/fs.cpp
+++ b/fastboot/fs.cpp
@@ -1,7 +1,6 @@
 #include "fs.h"
 
 #include "fastboot.h"
-#include "make_ext4fs.h"
 #include "make_f2fs.h"
 
 #include <errno.h>
@@ -12,6 +11,7 @@
 #include <sys/types.h>
 #include <unistd.h>
 
+#include <ext4_utils/make_ext4fs.h>
 #include <sparse/sparse.h>
 
 static int generate_ext4_image(int fd, long long partSize, const std::string& initial_dir)