Log Message:
libxslt: updated to 1.1.33

v1.1.33:
Portability:
Variables need 'extern' in static lib on Cygwin
Really declare dllexport/dllimport for Cygwin
Fix callback signatures in Python bindings
Fix transform callback signatures
Fix extension callback signatures
Fix deallocator signatures
Fix XPath callback signatures
Fix hash callback signatures

Bug Fixes:
Don't cache direct evaluation of patterns with variables
Move function result RVTs to context variable
Fix EXSLT functions returning RVTs from outer scopes
Fix handling of RVTs returned from nested EXSLT functions
Fix typos

Improvements:
Run Travis ASan tests with "sudo: required"

Cleanups:
Remove doc/libxslt-decl.txt
Docs for 1.1.32 release