Updated ACX_PTHREAD autoconf macro to current version, to try and fix thread-aware build problems on Solaris.
Updated ACX_PTHREAD autoconf macro to current version, to try and fix
thread-aware build problems on Solaris.


git-svn-id: 1a57124bbb9aca193a920d0ffd753d488afb922b@2341 5946f024-35f4-0310-b1b3-9a3be3380cfb

veprbl/mysqlpp,veprbl/mysqlpp,veprbl/mysqlpp