andorid: media-codecs-func: shellcheck: fix Expansions inside '${..}'

 In ./automated/android/media-codecs-functional-tests/linaro-android-userspace-tests.sh line 258:
   LINE="${LINE#${TEST_FILE}}"
                 ^----------^ SC2295 (info): Expansions inside ${..} need to be quoted separately, otherwise they match as patterns.

 Did you mean:
   LINE="${LINE#"${TEST_FILE}"}"

Fix like suggested.

Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
diff --git a/automated/android/media-codecs-functional-tests/linaro-android-userspace-tests.sh b/automated/android/media-codecs-functional-tests/linaro-android-userspace-tests.sh
index 20980f2..640935d 100755
--- a/automated/android/media-codecs-functional-tests/linaro-android-userspace-tests.sh
+++ b/automated/android/media-codecs-functional-tests/linaro-android-userspace-tests.sh
@@ -260,7 +260,7 @@
 		fi
 
 		# Remove the test file, leaving the MD5SUMs
-		LINE="${LINE#${TEST_FILE}}"
+		LINE="${LINE#"${TEST_FILE}"}"
 
 		TEST_FILE="${DATA_DIR}/${TEST_FILE}"
 		if [ ! -f ${TEST_FILE} ]; then