Merge pull request #495 from PiotrBzdrega/master

missing FUTEX_CLOCK_REALTIME declaration when build with flags -DINTERCEPT_SYSCALL -DINTERCEPT_FUTEX

Author: wolfcw

src/libfaketime.c

@@ -59,6 +59,9 @@
 #ifdef __linux__
 #include <stdarg.h>
 #include <sys/syscall.h>
+#ifdef INTERCEPT_FUTEX
+#include <linux/futex.h>
+#endif
 #else
 #error INTERCEPT_SYSCALL should only be defined on GNU/Linux systems.
 #endif