fix: restore static library for ncurses

It was actually used in pkgs, so it should be brought back.

Add a patch to make `.a` libraries reproducible.

Signed-off-by: Andrey Smirnov <andrey.smirnov@talos-systems.com>

ncurses/patches/reproducibility.patch

@@ -0,0 +1,36 @@
+http://cgit.openembedded.org/openembedded-core/plain/meta/recipes-core/ncurses/files/0002-configure-reproducible.patch?h=rocko
+
+From 939c994f3756c2d6d3cab2e6a04d05fa7c2b1d56 Mon Sep 17 00:00:00 2001
+From: Hongxu Jia <hongxu.jia@windriver.com>
+Date: Wed, 16 Aug 2017 14:45:27 +0800
+Subject: [PATCH 2/2] configure: reproducible
+
+"configure" enforces -U for ar flags, breaking deterministic builds.
+The flag was added to fix some vaguely specified "recent POSIX binutil
+build problems" in 2015.
+
+Upstream-Status: Pending
+Signed-off-by: Juro Bystricky <juro.bystricky@intel.com>
+
+Rebase to Rebase to 6.0+20170715
+
+Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
+---
+ configure | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/configure b/configure
+index 7d7d2c1..f444354 100755
+--- a/configure
++++ b/configure
+@@ -4458,7 +4458,7 @@ if test "${cf_cv_ar_flags+set}" = set; then
+ else
+
+ 	cf_cv_ar_flags=unknown
+-	for cf_ar_flags in -curvU -curv curv -crv crv -cqv cqv -rv rv
++	for cf_ar_flags in -curv curv -crv crv -cqv cqv -rv rv
+ 	do
+
+ 		# check if $ARFLAGS already contains this choice
+--
+1.8.3.1

ncurses/pkg.yaml

@@ -1,6 +1,7 @@
 name: ncurses
 dependencies:
   - stage: base
+  - stage: patch
 steps:
   - sources:
       - url: https://ftp.gnu.org/gnu/ncurses/ncurses-6.2.tar.gz
@@ -12,6 +13,9 @@ steps:
     prepare:
       - |
         tar -xzf ncurses.tar.gz --strip-components=1
+
+        patch -p1 < /pkg/patches/reproducibility.patch
+
         mkdir build
         cd build
 
@@ -32,8 +36,6 @@ steps:
       - |
         cd build
         make DESTDIR=/rootfs install
-
-        rm /rootfs${TOOLCHAIN}/lib/*.a
 finalize:
   - from: /rootfs
     to: /