win64 buildhost toolchains need to be older, too.

Author: tzarc

win64-native.sh

@@ -15,5 +15,6 @@ fi
 build_one \
     --sample-name=x86_64-w64-mingw32 \
     --no-cross-gdb-python \
+    --build-host-compile \
     ${extra_args:-} \
     "$@"

win64-win64-canadian.sh

@@ -12,4 +12,5 @@ build_one \
     --sample-name=x86_64-w64-mingw32 \
     --canadian-host=x86_64-w64-mingw32 \
     --no-cross-gdb-python \
+    --build-host-compile \
     "$@"