ncurses: Remove obsolete compile fixes

It seems both issues (GCC5 and Musl) were fixed at some point. Thus, they can be dropped.

Did not bump version as there is no change in functionality or size.

Compile-tested on ar71xx and mvebu, both with musl.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

package/libs/ncurses/patches/102-ncurses-5.9-gcc-5.patch

@@ -1,44 +0,0 @@
-https://bugs.gentoo.org/545114
-
-extracted from the upstream change (which had many unrelated commits in one)
-
-From 97bb4678dc03e753290b39bbff30ba2825df9517 Mon Sep 17 00:00:00 2001
-From: "Thomas E. Dickey" <dickey@invisible-island.net>
-Date: Sun, 7 Dec 2014 03:10:09 +0000
-Subject: [PATCH] ncurses 5.9 - patch 20141206
-
-+ modify MKlib_gen.sh to work around change in development version of
-  gcc introduced here:
-	  https://gcc.gnu.org/ml/gcc-patches/2014-06/msg02185.html
-	  https://gcc.gnu.org/ml/gcc-patches/2014-07/msg00236.html
-  (reports by Marcus Shawcroft, Maohui Lei).
-
---- a/ncurses/base/MKlib_gen.sh
-+++ b/ncurses/base/MKlib_gen.sh
-@@ -505,11 +505,22 @@ sed -n -f $ED1 \
- 	-e 's/gen_$//' \
- 	-e 's/  / /g' >>$TMP
- 
-+cat >$ED1 <<EOF
-+s/  / /g
-+s/^ //
-+s/ $//
-+s/P_NCURSES_BOOL/NCURSES_BOOL/g
-+EOF
-+
-+# A patch discussed here:
-+#	https://gcc.gnu.org/ml/gcc-patches/2014-06/msg02185.html
-+# introduces spurious #line markers.  Work around that by ignoring the system's
-+# attempt to define "bool" and using our own symbol here.
-+sed -e 's/bool/P_NCURSES_BOOL/g' $TMP > $ED2
-+cat $ED2 >$TMP
-+
- $preprocessor $TMP 2>/dev/null \
--| sed \
--	-e 's/  / /g' \
--	-e 's/^ //' \
--	-e 's/_Bool/NCURSES_BOOL/g' \
-+| sed -f $ED1 \
- | $AWK -f $AW2 \
- | sed -f $ED3 \
- | sed \

package/libs/ncurses/patches/200-fix_missing_include.patch

@@ -1,14 +0,0 @@
---- a/ncurses/curses.priv.h
-+++ b/ncurses/curses.priv.h
-@@ -55,6 +55,11 @@ extern "C" {
- 
- #include <ncurses_cfg.h>
- 
-+#if NEED_WCHAR_H
-+#include <stdarg.h>
-+#include <wchar.h>
-+#endif
-+
- #if USE_RCS_IDS
- #define MODULE_ID(id) static const char Ident[] = id;
- #else