build-mingw-w64: Bump to the version as of May 18th

This version fixes some cases of duplicate time.h related symbols,
in some build configurations (an issue only present in the
previous snapshot). This version also uses the right format attributes
for printf/scanf functions for Clang, enabling format string warnings
when using e.g. the mingw ansi stdio routines.

build-mingw-w64.sh

@@ -18,7 +18,7 @@ set -e
 
 : ${DEFAULT_WIN32_WINNT:=0x601}
 : ${DEFAULT_MSVCRT:=ucrt}
-: ${MINGW_W64_VERSION:=8fdf7c9b5c0d7fe3e01ee8cff13fac813f30d7be}
+: ${MINGW_W64_VERSION:=dbda83ce39374428f82af7294c876f49d5921483}
 
 CFGUARD_FLAGS="--enable-cfguard"