Fix regression tests bitrot on Linux. r=karnaze

layout/html/tests/block/rtest.sh

@@ -14,7 +14,9 @@ nodots() {
   echo $NODOTS_OUT
 }
 
-dirs="base bugs dom images net/HTML_Chars net/W3C net/baron net/boxAcidTest net/glazman net/mozilla ../table/core ../table/viewer_tests ../table/bugs ../table/marvin ../table/other ../table/dom"
+dirs="base bugs ../table/core ../table/viewer_tests ../table/bugs ../table/marvin ../table/other ../table/dom"
+
+#extra_dirs="net/HTML_Chars net/W3C net/baron net/boxAcidTest net/glazman net/mozilla"
 
 DEPTH="../../../../.."
 TEST_BASE=`dirname $0`

layout/html/tests/block/runtests.sh

@@ -5,7 +5,19 @@
 
 testsfile=/tmp/$$-tests.txt
 
-sed -e "s@file:///s\(:\||\)@file://$MOZ_TEST_BASE@" < file_list.txt > $testsfile
+cp /dev/null $testsfile
+
+for FILE in `ls file_list.txt file_list[0-9].txt 2> /dev/null`; do
+    egrep -v "^#" < $FILE \
+        | sed -e "s@file:///s\(:\||\)@file://$MOZ_TEST_BASE@" \
+        >> $testsfile
+done
+
+if [ \! -s $testfile ]; then
+    echo "WARNING: No file lists found in `pwd`"
+    rm -f $testsfile
+    return 0
+fi
 
 if test "$1"x = "baselinex"; then
   rm -r -f baseline