Make this sorta limp on Unix (where there is no cygpath stuff)

layout/html/tests/block/runtests.sh

@@ -80,8 +80,8 @@ if [ "$w1" = "" ]; then
 else
  TESTS_FILE=$TEMP\\$$-tests.txt
  TESTS_FILE=`cygpath -w $TESTS_FILE`
+ MOZ_TEST_BASE=`cygpath -w $MOZ_TEST_BASE | sed -e 's|\\|/|g'`
 fi
-MOZ_TEST_BASE=`cygpath -w $MOZ_TEST_BASE | sed -e 's|\\|/|g'`
 cp /dev/null $TESTS_FILE
 
 for FILE in `ls file_list.txt file_list[0-9].txt 2> /dev/null`; do