Contribs: patch iconv for WinRT

contrib/src/iconv/libiconv-winrt.patch

+--- iconv/libcharset/lib/localcharset.c	2014-03-10 20:39:14.105914067 +0100
++++ iconv/libcharset/lib/localcharset.c.new	2014-03-10 20:38:25.601822680 +0100
+@@ -465,7 +465,7 @@
+      GetConsoleOutputCP() encoding if it is using a TrueType font.
+      But in GUI programs and for output sent to files and pipes, GetACP()
+      encoding is the best bet.  */
+-  sprintf (buf, "CP%u", GetACP ());
++  sprintf (buf, "CP%u", 65001);
+   codeset = buf;
+ 
+ #elif defined OS2

contrib/src/iconv/rules.mak

@@ -30,6 +30,9 @@ ifdef HAVE_ANDROID
 endif
 ifdef HAVE_IOS
 	$(APPLY) $(SRC)/iconv/libiconv-android-ios.patch
+endif
+ifdef HAVE_WINRT
+	$(APPLY) $(SRC)/iconv/libiconv-winrt.patch
 endif
 	$(UPDATE_AUTOCONFIG) && cd $(UNPACK_DIR) && mv config.guess config.sub build-aux
 	$(UPDATE_AUTOCONFIG) && cd $(UNPACK_DIR) && mv config.guess config.sub libcharset/build-aux