THRIFT-4508: change windows CI builds to use current MSVC, one cygwin and one mingw build
diff --git a/build/appveyor/MSYS-appveyor-build.bat b/build/appveyor/MSYS-appveyor-build.bat
index b9d8955..4401729 100644
--- a/build/appveyor/MSYS-appveyor-build.bat
+++ b/build/appveyor/MSYS-appveyor-build.bat
@@ -33,12 +33,13 @@
   -DCMAKE_CXX_COMPILER=g++.exe ^
   -DCMAKE_MAKE_PROGRAM=make.exe ^
   -DCMAKE_INSTALL_PREFIX=%INSTDIR_MSYS% ^
+  -DLIBEVENT_ROOT=%LIBEVENT_ROOT% ^
   -DOPENSSL_LIBRARIES=%OPENSSL_LIBRARIES% ^
   -DOPENSSL_ROOT_DIR=%OPENSSL_ROOT% ^
   -DOPENSSL_USE_STATIC_LIBS=ON ^
   -DWITH_BOOST_STATIC=ON ^
   -DWITH_JAVA=OFF ^
-  -DWITH_LIBEVENT=OFF ^
+  -DWITH_LIBEVENT=ON ^
   -DWITH_PYTHON=%WITH_PYTHON% ^
   -DWITH_SHARED_LIB=OFF ^
   -DWITH_STATIC_LIB=ON