Make mips/mips64 syscall stubs more like the other architectures.

Change-Id: I55f8c1a95f643a6e484f12fbcc25e2c77e55b6b8
diff --git a/libc/arch-mips64/syscalls/perf_event_open.S b/libc/arch-mips64/syscalls/perf_event_open.S
index 14465fb..d796a16 100644
--- a/libc/arch-mips64/syscalls/perf_event_open.S
+++ b/libc/arch-mips64/syscalls/perf_event_open.S
@@ -1,14 +1,8 @@
 /* Generated by gensyscalls.py. Do not edit. */
 
-#include <asm/unistd.h>
-#include <machine/asm.h>
-#include <machine/regdef.h>
-    .text
-    .globl perf_event_open
-    .align 4
-    .ent perf_event_open
+#include <private/bionic_asm.h>
 
-perf_event_open:
+ENTRY(perf_event_open)
     .set push
     .set noreorder
     li v0, __NR_perf_event_open
@@ -28,4 +22,4 @@
     j t9
     move ra, t0
     .set pop
-    .end perf_event_open
+END(perf_event_open)