podman: fix build on MIPS

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Rosen Penev <rosenp@gmail.com>

utils/podman/patches/030-Fix-build-for-mips-architecture-followup.patch

@@ -0,0 +1,24 @@
+From fcba0df068d07ee7a26ec9d891220233d7d17dfd Mon Sep 17 00:00:00 2001
+From: Paul Holzinger <paul.holzinger@web.de>
+Date: Wed, 6 Jan 2021 23:32:40 +0100
+Subject: [PATCH] Fix build for mips architecture followup
+
+Followup to commit (1ad796677e1c). The build on mips is still
+failing because SIGWINCH was not defined in the signal pkg.
+
+Signed-off-by: Paul Holzinger <paul.holzinger@web.de>
+---
+ pkg/signal/signal_linux_mipsx.go | 2 ++
+ 1 file changed, 2 insertions(+)
+
+--- a/pkg/signal/signal_linux_mipsx.go
++++ b/pkg/signal/signal_linux_mipsx.go
+@@ -19,6 +19,8 @@ import (
+ const (
+ 	sigrtmin = 34
+ 	sigrtmax = 127
++
++	SIGWINCH = syscall.SIGWINCH
+ )
+ 
+ // signalMap is a map of Linux signals.