disable pthread_cleanup_push and pthread_cleanup_post, as we lack tho…

…se api

update vendor to version 3.13.11

fix a merge issue, and load sysconfig always in non _mswindows case

update to version 3.13.2

update vendor to version 3.9.21

don't use -fvisibility

udpate vendor to 3.9.17

Merge branch 'vendor'

fixes ticket #9

merge master to version 3.9.13