Use the new executable for mkuserimg_mke2fs

This is in line with the change of mkuserimg_mke2fs.sh to python binary.

Bug: 112555072
Bug: 63866463
Test: unittests pass
Change-Id: I82c0be1e5bbc685edc15120da73aa43fdc9f2f05

tools/releasetools/test_validate_target_files.py

@@ -121,13 +121,13 @@ class ValidateTargetFilesTest(unittest.TestCase):
 
     # Use an empty root directory.
     system_root = common.MakeTempDir()
-    cmd = ['mkuserimg_mke2fs.sh', '-s', system_root, output_file, 'ext4',
+    cmd = ['mkuserimg_mke2fs', '-s', system_root, output_file, 'ext4',
            '/system', str(adjusted_size), '-j', '0']
     proc = common.Run(cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
     stdoutdata, _ = proc.communicate()
     self.assertEqual(
         0, proc.returncode,
-        "Failed to create system image with mkuserimg_mke2fs.sh: {}".format(
+        "Failed to create system image with mkuserimg_mke2fs: {}".format(
             stdoutdata))
 
     # Append the verity metadata.