update trigger wheel build for new wheel building

misc/trigger_wheel_build.sh

@@ -5,20 +5,18 @@
 
 # $WHEELS_PUSH_TOKEN is stored in travis and is an API token for the
 # mypy-build-bot account.
-git clone --recurse-submodules https://${WHEELS_PUSH_TOKEN}@github.com/mypyc/mypy_mypyc-wheels.git build
 
 git config --global user.email "nobody"
 git config --global user.name "mypy wheels autopush"
 
 COMMIT=$(git rev-parse HEAD)
-cd build/mypy
-git fetch
-git checkout $COMMIT
-git submodule update
-pip install -r test-requirements.txt
+pip install -r mypy-requirements.txt
 V=$(python3 -m mypy --version)
 V=$(echo "$V" | cut -d" " -f2)
-cd ..
+
+git clone https://${WHEELS_PUSH_TOKEN}@github.com/mypyc/mypy_mypyc-wheels.git build
+cd build
+echo $COMMIT > mypy_commit
 git commit -am "Build wheels for mypy $V"
 git tag v$V
 # Push a tag, but no need to push the change to master