cmake ILMTHREAD_HAVE_SEMAPHORE_H examples

AcademySoftwareFoundation/openexr cmake/CMakeLists.txt :101

check_include_files("pthread_unistd.h;semaphore.h" ILMTHREAD_HAVE_SEMAPHORE_H)

AcademySoftwareFoundation/openexr cmake/CMakeLists.txt :103

check_include_files(semaphore.h ILMTHREAD_HAVE_SEMAPHORE_H)