LINT: Switch whitelist check from egrep to awk

Bonus: make CI happy with the last rules fix

util/travis/lint.sh

@@ -6,6 +6,7 @@ function perform_lint() {
 	else
 		CLANG_FORMAT=clang-format
 	fi
+	echo "LINT: Using binary $CLANG_FORMAT"
 	CLANG_FORMAT_WHITELIST="util/travis/clang-format-whitelist.txt"
 
 	if [ "$TRAVIS_EVENT_TYPE" = "pull_request" ]; then
@@ -22,10 +23,10 @@ function perform_lint() {
 		d=$(diff -u "$f" <(${CLANG_FORMAT} "$f") || true)
 
 		if ! [ -z "$d" ]; then
-			whitelisted=$(egrep -c "^${f}" "${CLANG_FORMAT_WHITELIST}")
+			whitelisted=$(awk '$1 == "'$f'" { print 1 }' "$CLANG_FORMAT_WHITELIST")
 
 			# If file is not whitelisted, mark a failure
-			if [ ${whitelisted} -eq 0 ]; then
+			if [ -z ${whitelisted} ]; then
 				errorcount=$((errorcount+1))
 
 				printf "The file %s is not compliant with the coding style" "$f"