libxml2对pthread的依赖分平台设置
Merge branch 't/3rdTools/libxml2' into refs/top-bases/t/support/game
Merge branch 't/3rdTools/libxml2' into refs/top-bases/t/support/dr2
Merge commit 'refs/top-bases/t/support/dr2' into t/support/dr2
Merge branch 't/support/dr2' into refs/top-bases/t/support/game
Merge commit 'refs/top-bases/t/support/game' into t/support/game
Merge commit 'refs/top-bases/t/svr/env' into t/svr/env