wine build: build 64-bit windows binaries

required for qt6

related: https://github.com/spesmilo/electrum/issues/6598

.cirrus.yml

@@ -188,13 +188,17 @@ task:
     cpu: 1
     memory: 2G
   pip_cache:
-    folder: contrib/build-wine/.cache/win32/wine_pip_cache
+    folders:
+      - contrib/build-wine/.cache/win32/wine_pip_cache
+      - contrib/build-wine/.cache/win64/wine_pip_cache
     fingerprint_script:
       - echo $CIRRUS_TASK_NAME
       - git ls-files -s contrib/deterministic-build/*.txt
       - git ls-files -s contrib/build-wine/
   build2_cache:
-    folder: contrib/build-wine/.cache/win32/build
+    folders:
+      - contrib/build-wine/.cache/win32/build
+      - contrib/build-wine/.cache/win64/build
     fingerprint_script:
       - echo $CIRRUS_TASK_NAME
       - cat contrib/make_libsecp256k1.sh | sha256sum

contrib/build-wine/make_win.sh

@@ -6,7 +6,7 @@ here="$(dirname "$(readlink -e "$0")")"
 test -n "$here" -a -d "$here" || exit
 
 if [ -z "$WIN_ARCH" ] ; then
-    export WIN_ARCH="win32"  # default
+    export WIN_ARCH="win64"  # default
 fi
 if [ "$WIN_ARCH" = "win32" ] ; then
     export GCC_TRIPLET_HOST="i686-w64-mingw32"