Updated to v4.4.1 kernel headers.

Bug: 23789423
Change-Id: I45ef68b3955c1f4d91ed53db8c519fce64d57f09
diff --git a/original/uapi/asm-arm64/asm/signal.h b/original/uapi/asm-arm64/asm/signal.h
index 8d1e723..991bf5d 100644
--- a/original/uapi/asm-arm64/asm/signal.h
+++ b/original/uapi/asm-arm64/asm/signal.h
@@ -19,6 +19,9 @@
 /* Required for AArch32 compatibility. */
 #define SA_RESTORER	0x04000000
 
+#define MINSIGSTKSZ 5120
+#define SIGSTKSZ    16384
+
 #include <asm-generic/signal.h>
 
 #endif