Log Message:
Update libxslt to 1.1.5

Changes:

1.1.5: Mar 23 2004:
   - performance: use dictionnary lookup for variables
   - remove use of _private from source documents
   - cleanup of "make tests" output
   - bugfixes: AVT in local variables, use localtime_r to avoid thread
    troubles (William), dictionary handling bug (William), limited number of
    stubstitutions in AVT (William), tokenize fix for UTF-8 (William),
    superfluous namespace (William), xsltproc error code on
    <xsl:message> halt, OpenVMS fix, dictionnary reference counting
    change.