build-mingw-w64: Bump to the current version fron March 20th

Notable changes:
- Support for _FORTIFY_SOURCE=3
- Fortification of [v]s[n]printf for UCRT
- Add the __gets_chk function, for fortification of the (highly
  deprecated) gets function
- Fixed the inconsistent signature of the wcstok function on UCRT
  in string.h
- Allow opting out from SEH based setjmp/longjmp by defining
  __USE_MINGW_SETJMP_NON_SEH before including setjmp.h

And as usual, lots of other minor updates.

Author: mstorsjo

build-mingw-w64.sh

@@ -18,7 +18,7 @@ set -e
 
 : ${DEFAULT_WIN32_WINNT:=0x601}
 : ${DEFAULT_MSVCRT:=ucrt}
-: ${MINGW_W64_VERSION:=ce5a9f624dfc691082dad2ea2af7b1985e3476b5}
+: ${MINGW_W64_VERSION:=0f2264e7b8fedbe225921367e82aeb97ddfed46b}
 
 CFGUARD_FLAGS="--enable-cfguard"