Appveyor Fixes (macOS)

Author: petasis

.appveyor.yml

@@ -243,6 +243,7 @@ for:
     - export CFLAGS=
     - export CXX="clang++ -arch arm64"
     - export CXXFLAGS=
+    - export CONFIGURE_ARGS="--host=arm64"
     - ./configure --prefix=${TKDND_RUNTIME} --exec-prefix=${TKDND_RUNTIME} ${CONFIGURE_ARGS} && make && make test
     - make install
     - cd ${TKDND_RUNTIME}/lib && tar -czvf ${FILE_TO_UPLOAD_ARM} tkdnd${TKDND_VERSION} && rm -rf tkdnd${TKDND_VERSION}