ci: Fix weird filesystem globs appearing in failed test .qpa files.

When you get a filure and go looking in the results, you'll find weird stuff like this in the XML:

Reference images fill undefined pixels with 3x3 grid pattern.
Attachment 0 (p' = p bin boot builds
dEQP-VK.renderpass.suballocation.attachment_allocation.grow_shrink.89.qpa
deqp dev etc home init install lib media mnt proc results root run sbin
set-job-env-vars.sh sys tmp usr var (1, 1, 1, 1) + (-1, -1, -1, 1))

because we were not quoting the line and 'p *' was getting expanded.

Reviewed-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5435>

.gitlab-ci/deqp-runner.sh

@@ -149,10 +149,10 @@ extract_xml_result() {
             if [ "$line" = "$start" ]; then
                 dst="$testcase.qpa"
                 echo "#beginSession" > $dst
-                echo $line >> $dst
+                echo "$line" >> $dst
                 while IFS= read -r line; do
                     if [ "$line" = "#endTestCaseResult" ]; then
-                        echo $line >> $dst
+                        echo "$line" >> $dst
                         echo "#endSession" >> $dst
                         /deqp/executor/testlog-to-xml $dst "$RESULTS/$testcase$DEQP_RUN_SUFFIX.xml"
                         # copy the stylesheets here so they only end up in artifacts
@@ -161,7 +161,7 @@ extract_xml_result() {
                         cp /deqp/testlog.xsl "$RESULTS/"
                         return 0
                     fi
-                    echo $line >> $dst
+                    echo "$line" >> $dst
                 done
                 return 1
             fi