Update to v6.3 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-6.3

Test: Bionic unit tests pass.
Change-Id: I5270ef291a77343e47ef3a5fbd02b8cacf218ec5
diff --git a/libc/kernel/uapi/asm-arm64/asm/kvm.h b/libc/kernel/uapi/asm-arm64/asm/kvm.h
index ce0c318..a413b36 100644
--- a/libc/kernel/uapi/asm-arm64/asm/kvm.h
+++ b/libc/kernel/uapi/asm-arm64/asm/kvm.h
@@ -74,6 +74,7 @@
 #define KVM_ARM_VCPU_SVE 4
 #define KVM_ARM_VCPU_PTRAUTH_ADDRESS 5
 #define KVM_ARM_VCPU_PTRAUTH_GENERIC 6
+#define KVM_ARM_VCPU_HAS_EL2 7
 struct kvm_vcpu_init {
   __u32 target;
   __u32 features[7];