package/ncurses: change AR options to fix reproducible builds

ar has a deterministic (-D) and non-deterministic (-U) mode.
OpenWrt is already using the deterministic mode by default,
but ncurses' configure script force this to be non-deterministic.
Since autoreconf fails to generate a new configure, the configure script
is directly modified.

Signed-off-by: Alexander Couzens <lynxis@fe80.eu>

package/libs/ncurses/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=ncurses
 PKG_VERSION:=6.1
-PKG_RELEASE:=3
+PKG_RELEASE:=4
 
 PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-$(PKG_VERSION)
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz

package/libs/ncurses/patches/103-ncurses-ar-determinism.patch

@@ -0,0 +1,22 @@
+--- a/aclocal.m4
++++ b/aclocal.m4
+@@ -451,7 +451,7 @@ AC_REQUIRE([CF_PROG_AR])
+ 
+ AC_CACHE_CHECK(for options to update archives, cf_cv_ar_flags,[
+ 	cf_cv_ar_flags=unknown
+-	for cf_ar_flags in -curvU -curv curv -crv crv -cqv cqv -rv rv
++	for cf_ar_flags in -curvD -curv curv -crv crv -cqv cqv -rv rv
+ 	do
+ 
+ 		# check if $ARFLAGS already contains this choice
+--- a/configure
++++ b/configure
+@@ -4503,7 +4503,7 @@ if test "${cf_cv_ar_flags+set}" = set; t
+ 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 -curvD -curv curv -crv crv -cqv cqv -rv rv
+ 	do
+ 
+ 		# check if $ARFLAGS already contains this choice