Add missing pthread includes

Author: yurivict

ggml/src/ggml.c

@@ -23,6 +23,8 @@
 #include <stdio.h>
 #include <float.h>
 #include <limits.h>
+#include <pthread.h>
+#include <pthread_np.h>
 #include <stdarg.h>
 #include <signal.h>
 #if defined(__gnu_linux__)