Update to kernel headers v5.3.2.

Test: Builds and run unit tests on taimen/cuttlefish.
Change-Id: I6ebd8f179d159ac974555e8edca588083e8081b3
diff --git a/libc/kernel/uapi/asm-arm64/asm/ptrace.h b/libc/kernel/uapi/asm-arm64/asm/ptrace.h
index c4c5748..b3e0aea 100644
--- a/libc/kernel/uapi/asm-arm64/asm/ptrace.h
+++ b/libc/kernel/uapi/asm-arm64/asm/ptrace.h
@@ -45,6 +45,8 @@
 #define PSR_s 0x00ff0000
 #define PSR_x 0x0000ff00
 #define PSR_c 0x000000ff
+#define PTRACE_SYSEMU 31
+#define PTRACE_SYSEMU_SINGLESTEP 32
 #ifndef __ASSEMBLY__
 struct user_pt_regs {
   __u64 regs[31];