Add schedule policy test cases#1

Open

hongjunxin wants to merge 8 commits intoemscripten-core:mainfrom

hongjunxin:master

Commits on Aug 30, 2019

Commits on Sep 7, 2019

Commits on Sep 9, 2019

add semaphore schedule policy test
hongjunxin
committed

Commits on Dec 7, 2019

PTHREAD_MUTEX_DEFAULT not defined as macro,but declare as enum
hongjunxin
committed
Merge branch 'master' of github.com:hongjunxin/posixtestsuite
hongjunxin
committed

Commits on Dec 8, 2019

add missing head files for passing compilation
hongjunxin
committed