Add Boehms atomics library - will come in handy
treed774d7294ccd3b03a54d38f1d450aa691c6cff70
-rw-r--r-- 413 PortablePlatformAtomics.cpp
-rw-r--r-- 2510 PortablePlatformAtomics.h
-rw-r--r-- 110 RelacyAtomics.cpp
-rw-r--r-- 2935 RelacyAtomics.h
drwxr-xr-x - extern