travis: ignore profiling warning in test diffs

On Travis CI running tests with code coverage enabled sometimes
generates lines like:
  profiling:/path/to/file.gcda:Merge mismatch for function 257
It would be nice if we could resolve this somehow as it garbles the
statistics, but until then it is far more annoying that this causes
test failures for no good reason.

Gbp-Dch: Ignore

test/integration/framework

@@ -1394,7 +1394,20 @@ downloadfile() {
 }
 
 checkdiff() {
-	local DIFFTEXT="$(command diff -u "$@" 2>&1 | sed -e '/^---/ d' -e '/^+++/ d' -e '/^@@/ d')"
+	local TMPFILE1="${TMPWORKINGDIRECTORY}/rootdir/tmp/checkdiff.1.tmp"
+	local TMPFILE2="${TMPWORKINGDIRECTORY}/rootdir/tmp/checkdiff.2.tmp"
+	touch "$TMPFILE1" "$TMPFILE2"
+	if [ "$1" != '-' ]; then
+		sed -e '/^profiling:/ d' < "$1" >"$TMPFILE1"
+	else
+		TMPFILE1='-'
+	fi
+	if [ "$2" != '-' ]; then
+		sed -e '/^profiling:/ d' < "$2" >"$TMPFILE2"
+	else
+		TMPFILE2='-'
+	fi
+	local DIFFTEXT="$(command diff -u "$TMPFILE1" "$TMPFILE2" 2>&1 | sed -e '/^---/ d' -e '/^+++/ d' -e '/^@@/ d')"
 	if [ -n "$DIFFTEXT" ]; then
 		echo >&2
 		echo >&2 "$DIFFTEXT"