ci: fix reporting the number of unexpected/flakes

`wc -l $file` returns the number of lines and the filename.

Fixes: b8c66aeb93 ("ci: Clean up some excessive use of pipes in dEQP results processing.")
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Andres Gomez <agomez@igalia.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4829>

.gitlab-ci/deqp-runner.sh

@@ -259,7 +259,7 @@ if [ $DEQP_EXITCODE -ne 0 ]; then
         cat $UNEXPECTED_RESULTSFILE.txt
     fi
 
-    count=`wc -l $UNEXPECTED_RESULTSFILE.txt`
+    count=`cat $UNEXPECTED_RESULTSFILE.txt | wc -l`
 
     # Re-run fails to detect flakes.  But use a small threshold, if
     # something was fundamentally broken, we don't want to re-run
@@ -267,7 +267,7 @@ if [ $DEQP_EXITCODE -ne 0 ]; then
 else
     grep ",Flake" $RESULTSFILE > $FLAKESFILE
 
-    count=`wc -l $FLAKESFILE`
+    count=`cat $FLAKESFILE | wc -l`
     if [ $count -gt 0 ]; then
         echo "Some flakes found (see cts-runner-flakes.txt in artifacts for full results):"
         head -n 50 $FLAKESFILE