contrib: gettext: update to latest release 0.18.3

drop patch not needed anymore

contrib/src/gettext/SHA512SUMS

-9290efb692c25f0469fa2aec66e382603d2eb5e6873be30b3f6fea73c1c4ae99250a5d3292100316873dd7e3c791be834655ac3659e36100e8ecb128100a4235  gettext-0.18.2.1.tar.gz
+812074a74c946c34b97efa351a3d2b1ff5b6321714e88912d188ba70c868c9d9b7263a8507514c05c1667bc5613e88d9a44569575db73dd046780824b0975bfd  gettext-0.18.3.tar.gz

contrib/src/gettext/rules.mak

 # gettext
-GETTEXT_VERSION=0.18.2.1
+GETTEXT_VERSION=0.18.3
 GETTEXT_URL=$(GNU)/gettext/gettext-$(GETTEXT_VERSION).tar.gz
 
 PKGS += gettext
@@ -15,7 +15,6 @@ $(TARBALLS)/gettext-$(GETTEXT_VERSION).tar.gz:
 
 gettext: gettext-$(GETTEXT_VERSION).tar.gz .sum-gettext
 	$(UNPACK)
-	$(APPLY) $(SRC)/gettext/win32.patch
 	$(MOVE)
 
 DEPS_gettext = iconv $(DEPS_iconv)

contrib/src/gettext/win32.patch

---- gettext/gettext-runtime/gnulib-lib/msvc-inval.c.orig	2013-07-02 17:44:02.000000000 +0200
-+++ gettext/gettext-runtime/gnulib-lib/msvc-inval.c	2013-07-02 17:42:58.000000000 +0200
-@@ -28,7 +28,7 @@
- 
- # if MSVC_INVALID_PARAMETER_HANDLING == DEFAULT_HANDLING
- 
--static void cdecl
-+static void __cdecl
- gl_msvc_invalid_parameter_handler (const wchar_t *expression,
-                                    const wchar_t *function,
-                                    const wchar_t *file,