Fix Termux build.

src/common/Platform_unix.cpp

@@ -29,11 +29,13 @@
 #endif
 
 
+#include <pthread.h>
 #include <sched.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/resource.h>
+#include <unistd.h>
 #include <uv.h>