Add Darwin ndk prebuilts

From android-ndk-r21d-darwin-x86_64.zip ef06c9f9d7efd6f243eb3c05ac440562ae29ae12

BUG: 159916003
Change-Id: Ia0089b9d4f50b5882f94d7fdc757172ec7371966
diff --git a/sysroot/usr/include/linux/rseq.h b/sysroot/usr/include/linux/rseq.h
new file mode 100644
index 0000000..ba0ceb1
--- /dev/null
+++ b/sysroot/usr/include/linux/rseq.h
@@ -0,0 +1,68 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   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 _UAPI_LINUX_RSEQ_H
+#define _UAPI_LINUX_RSEQ_H
+#include <linux/types.h>
+#include <asm/byteorder.h>
+enum rseq_cpu_id_state {
+  RSEQ_CPU_ID_UNINITIALIZED = - 1,
+  RSEQ_CPU_ID_REGISTRATION_FAILED = - 2,
+};
+enum rseq_flags {
+  RSEQ_FLAG_UNREGISTER = (1 << 0),
+};
+enum rseq_cs_flags_bit {
+  RSEQ_CS_FLAG_NO_RESTART_ON_PREEMPT_BIT = 0,
+  RSEQ_CS_FLAG_NO_RESTART_ON_SIGNAL_BIT = 1,
+  RSEQ_CS_FLAG_NO_RESTART_ON_MIGRATE_BIT = 2,
+};
+enum rseq_cs_flags {
+  RSEQ_CS_FLAG_NO_RESTART_ON_PREEMPT = (1U << RSEQ_CS_FLAG_NO_RESTART_ON_PREEMPT_BIT),
+  RSEQ_CS_FLAG_NO_RESTART_ON_SIGNAL = (1U << RSEQ_CS_FLAG_NO_RESTART_ON_SIGNAL_BIT),
+  RSEQ_CS_FLAG_NO_RESTART_ON_MIGRATE = (1U << RSEQ_CS_FLAG_NO_RESTART_ON_MIGRATE_BIT),
+};
+struct rseq_cs {
+  __u32 version;
+  __u32 flags;
+  __u64 start_ip;
+  __u64 post_commit_offset;
+  __u64 abort_ip;
+} __attribute__((aligned(4 * sizeof(__u64))));
+struct rseq {
+  __u32 cpu_id_start;
+  __u32 cpu_id;
+  union {
+    __u64 ptr64;
+#ifdef __LP64__
+    __u64 ptr;
+#else
+    struct {
+#if defined(__BYTE_ORDER) && __BYTE_ORDER == __BIG_ENDIAN || defined(__BIG_ENDIAN)
+      __u32 padding;
+      __u32 ptr32;
+#else
+      __u32 ptr32;
+      __u32 padding;
+#endif
+    } ptr;
+#endif
+  } rseq_cs;
+  __u32 flags;
+} __attribute__((aligned(4 * sizeof(__u64))));
+#endif