[profile] Fix a profile runtime build bug for darwin

[davidxl]

Summary

EXTRA_FLAGS was never passed to rt build for darwin. This means HAS_ATOMICS and HAS_FCTNL macros were not properly set for darwin runtime build -- end up with build using stub functions.

Also getpid() requires including <unistd.h> on darwin too.

[vsk]

Thanks for catching this!

lib/profile/CMakeLists.txt

     STATIC
     OS ${PROFILE_SUPPORTED_OS}
     ARCHS ${PROFILE_SUPPORTED_ARCH}
+    CFLAGS ${EXTRA_FLAGS}
     SOURCES ${PROFILE_SOURCES}
     PARENT_TARGET profile)
 else()

lib/profile/InstrProfilingUtil.c

 #else
 #include <sys/stat.h>
 #include <sys/types.h>
-#if defined(__linux__)
 #include <unistd.h>
-#endif
 #include <fcntl.h>
 #include <errno.h>
 #endif