Revert "Update bionic kernel headers using update_all.py"

This reverts commit 94a85f663694e1869acb1c2e8a3c374a6fa3ab86

There is a smoke test failure for Prime but Crespo/Stingray are fine. Will revert the change for now until further investigation is made.
diff --git a/libc/kernel/arch-arm/asm/spinlock.h b/libc/kernel/arch-arm/asm/spinlock.h
index a7b2858..3ae2173 100644
--- a/libc/kernel/arch-arm/asm/spinlock.h
+++ b/libc/kernel/arch-arm/asm/spinlock.h
@@ -7,27 +7,21 @@
  ***   structures, and macros generated from the original header, and thus,
  ***   contains no copyrightable information.
  ***
- ***   To edit the content of this header, modify the corresponding
- ***   source file (e.g. under external/kernel-headers/original/) then
- ***   run bionic/libc/kernel/tools/update_all.py
- ***
- ***   Any manual change here will be lost the next time this script will
- ***   be run. You've been warned!
- ***
  ****************************************************************************
  ****************************************************************************/
 #ifndef __ASM_SPINLOCK_H
 #define __ASM_SPINLOCK_H
+
 #if __LINUX_ARM_ARCH__ < 6
 #error SMP not supported on pre-ARMv6 CPUs
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
+
 #define __raw_spin_is_locked(x) ((x)->lock != 0)
 #define __raw_spin_unlock_wait(lock)   do { while (__raw_spin_is_locked(lock)) cpu_relax(); } while (0)
+
 #define __raw_spin_lock_flags(lock, flags) __raw_spin_lock(lock)
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
+
 #define rwlock_is_locked(x) (*((volatile unsigned int *)(x)) != 0)
 #define __raw_write_can_lock(x) ((x)->lock == 0x80000000)
 #define __raw_read_can_lock(x) ((x)->lock < 0x80000000)
 #endif
-/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */