Exclude JPDFium native cache from temp-file regression check

testing/test.sh

@@ -442,8 +442,13 @@ compare_file_lists() {
             echo "New files created during test:"
             cat "${diff_file}.added" | sed 's/^> //'
 
-            # Check for tmp files
-            grep -i "tmp\|temp" "${diff_file}.added" > "${diff_file}.tmp" || true
+            # Check for tmp files. JPDFium's NativeLoader extracts native
+            # libs (libpdfium.so, libjpdfium.so, ICU, harfbuzz, etc.) into
+            # /tmp/.../jpdfium-<id>/ on first use and registers deleteOnExit
+            # so they're cleaned up at JVM shutdown; they're not leaks.
+            grep -i "tmp\|temp" "${diff_file}.added" \
+                | grep -v '/jpdfium-[0-9]\+/' \
+                > "${diff_file}.tmp" || true
             if [ -s "${diff_file}.tmp" ]; then
                 echo "WARNING: Temporary files detected:"
                 cat "${diff_file}.tmp"