Re-ordering the headers in the below patch fixes aarch64
compilation, due to gzip.h defining

#  define head (prev+WSIZE) 

and <asm/sigcontext.h> using

struct fpsimd_context {
	struct _aarch64_ctx head;
	/* ... */
}

diff -u -r ../gzip-1.6/zip.c ./zip.c
--- ../gzip-1.6/zip.c	2013-02-01 23:39:13.000000000 -0500
+++ ./zip.c	2016-01-03 19:37:00.603075562 -0500
@@ -20,12 +20,12 @@
 #include <config.h>
 #include <ctype.h>
 
-#include "tailor.h"
-#include "gzip.h"
-
 #include <unistd.h>
 #include <fcntl.h>
 
+#include "tailor.h"
+#include "gzip.h"
+
 local ulg crc;       /* crc on uncompressed file data */
 off_t header_bytes;   /* number of bytes in gzip header */