Kernel/LibC: Implement flock

userspace/libraries/LibC/sys/file.cpp

@@ -0,0 +1,8 @@
+#include <sys/file.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+
+int flock(int fd, int op)
+{
+	return syscall(SYS_FLOCK, fd, op);
+}