HPUX port - fixed assertion for RISC machines with compiler missing __thread support

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@59732 65644016-39b1-43b1-bf79-96bc8fe82c15
Current HPUX reported to support __thread

git-svn-id: svn+ssh://svn.code.sf.net/p/firebird/code/firebird/trunk@59733 65644016-39b1-43b1-bf79-96bc8fe82c15