Update to v5.15 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-5.15

Test: Builds, and ran bionic unit tests on flame.
Change-Id: I86901ea6d89fb0f7384b90a47bef35d194083c24
diff --git a/libc/kernel/uapi/asm-x86/asm/kvm.h b/libc/kernel/uapi/asm-x86/asm/kvm.h
index 4eb8901..2db4566 100644
--- a/libc/kernel/uapi/asm-x86/asm/kvm.h
+++ b/libc/kernel/uapi/asm-x86/asm/kvm.h
@@ -257,6 +257,7 @@
 #define KVM_GUESTDBG_USE_HW_BP 0x00020000
 #define KVM_GUESTDBG_INJECT_DB 0x00040000
 #define KVM_GUESTDBG_INJECT_BP 0x00080000
+#define KVM_GUESTDBG_BLOCKIRQ 0x00100000
 struct kvm_guest_debug_arch {
   __u64 debugreg[8];
 };