<rdar://problem/5695344> check-for-global-initializers script never checks...

    <rdar://problem/5695344> check-for-global-initializers script never checks any object files

        Reviewed by Darin.

        We now touch a check-for-global-initializers.timestamp file in
        the TARGET_TEMP_DIR directory to determine when new object files
        have been compiled and thus need to be checked.  If the timestamp
        file doesn't exist, all object files will be checked.

        Previously the modification time of the "executable" (the
        framework binary, e.g., WebKit.framework/WebKit) was used, but
        since this was the last file modified at the end of the compile
        phase, no object files would ever get checked!

        Also added JSCustomSQLTransactionCallback.o to the list of files
        since it has static initializers in Debug builds of WebCore.

        * Scripts/check-for-global-initializers:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@29668 268f45cc-cd09-0410-ab3c-d52691b4dbfc