gzip-1.6: Fix gzexe backup generation

Signed-off-by: Timothy Gu <timothygu99@gmail.com>

app-arch/gzip/patches/gzip-1.6.patchset

@@ -0,0 +1,25 @@
+From 39ee8c0d94879bde10822f2b95caedde3d6842fb Mon Sep 17 00:00:00 2001
+From: Timothy Gu <timothygu99@gmail.com>
+Date: Tue, 16 Dec 2014 21:50:24 +0000
+Subject: [PATCH] gzexe: Fallback on file copying for backup
+
+BFS doesn't support hard links.
+
+Signed-off-by: Timothy Gu <timothygu99@gmail.com>
+
+diff --git a/gzexe.in b/gzexe.in
+index e458563..45e1900 100644
+--- a/gzexe.in
++++ b/gzexe.in
+@@ -218,7 +218,7 @@ EOF
+     echo >&2 "$0: $tmp: cannot chmod"
+     continue
+   }
+-  ln -f "$file" "$file~" || {
++  ln -f "$file" "$file~" || cp -f "$file" "${file}~" || {
+     res=$?
+     echo >&2 "$0: cannot backup $i as $i~"
+     continue
+-- 
+1.8.3.4
+