cmake WINPR_HAVE_UNISTD_H examples

FreeRDP/FreeRDP winpr/CMakeLists.txt :181 

check_include_files(unistd.h WINPR_HAVE_UNISTD_H)

FreeRDP/FreeRDP winpr/CMakeLists.txt :216 

check_include_files(unistd.h WINPR_HAVE_UNISTD_H)