Update to v6.6 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-6.6

Test: Builds and bionic unit tests pass on raven.
Test: Able to log in to an Android GO 32 bit device.
Change-Id: Ib5ff5a23f382721d98d1e428a295c6794b190d8d
diff --git a/libc/kernel/uapi/asm-x86/asm/mman.h b/libc/kernel/uapi/asm-x86/asm/mman.h
index 1061a6f..693ab82 100644
--- a/libc/kernel/uapi/asm-x86/asm/mman.h
+++ b/libc/kernel/uapi/asm-x86/asm/mman.h
@@ -19,5 +19,7 @@
 #ifndef _ASM_X86_MMAN_H
 #define _ASM_X86_MMAN_H
 #define MAP_32BIT 0x40
+#define MAP_ABOVE4G 0x80
+#define SHADOW_STACK_SET_TOKEN (1ULL << 0)
 #include <asm-generic/mman.h>
 #endif