Prevent freetds to link to wrong ws2_32 lib on i686-w64-mingw32

This fixes broken 32 bit build on Appveyor-CI.

Also print config.log to ease debugging.

appveyor.yml

@@ -20,6 +20,8 @@ install:
   - ruby --version
   - gem --version
 
+  # prevent freetds to link to wrong ws2_32 lib on i686-w64-mingw32
+  - c:/msys64/usr/bin/rm /usr/lib/w32api/libws2_32.a
   # Set up project prerequisits
   - bundle install
   - bundle exec rake ports
@@ -52,4 +54,5 @@ environment:
     - ruby_version: "26"
     - ruby_version: "head-x64"
 on_failure:
+  - find -name config.log | xargs cat
   - find -name compile.log | xargs cat