move new linux syscall wrapper functions to proper source dir

src/linux/arch_prctl.c

@@ -0,0 +1,9 @@
+#include "syscall.h"
+#ifdef SYS_arch_prctl
+#include "libc.h"
+int __arch_prctl(int code, unsigned long addr)
+{
+	return syscall(SYS_arch_prctl, code, addr);
+}
+weak_alias(__arch_prctl, arch_prctl);
+#endif

src/linux/personality.c

@@ -0,0 +1,7 @@
+#include "syscall.h"
+#ifdef SYS_personality
+int personality(unsigned long persona)
+{
+	return syscall(SYS_personality, persona);
+}
+#endif