Updated to v4.4.1 kernel headers.

Bug: 23789423
Change-Id: I45ef68b3955c1f4d91ed53db8c519fce64d57f09
diff --git a/original/uapi/asm-arm64/asm/ucontext.h b/original/uapi/asm-arm64/asm/ucontext.h
new file mode 100644
index 0000000..791de8e
--- /dev/null
+++ b/original/uapi/asm-arm64/asm/ucontext.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2012 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _UAPI__ASM_UCONTEXT_H
+#define _UAPI__ASM_UCONTEXT_H
+
+#include <linux/types.h>
+
+struct ucontext {
+	unsigned long	  uc_flags;
+	struct ucontext	 *uc_link;
+	stack_t		  uc_stack;
+	sigset_t	  uc_sigmask;
+	/* glibc uses a 1024-bit sigset_t */
+	__u8		  __unused[1024 / 8 - sizeof(sigset_t)];
+	/* last for future expansion */
+	struct sigcontext uc_mcontext;
+};
+
+#endif /* _UAPI__ASM_UCONTEXT_H */