The Tycho build module is missing

[jamuir]

There are apks for Tycho in the opengapps projects, but there is no build module:

vendor/google/build$ mgrep Tycho
./opengapps-packages.mk:109:    Tycho \
vendor/google/build$ cd ../../opengapps/sources/
vendor/opengapps/sources$ find . -type d -iname "*tycho*"
./all/app/com.google.android.apps.tycho
vendor/opengapps/sources$ find ./all/app/com.google.android.apps.tycho
./all/app/com.google.android.apps.tycho
./all/app/com.google.android.apps.tycho/22
./all/app/com.google.android.apps.tycho/22/nodpi
./all/app/com.google.android.apps.tycho/22/nodpi/31180.apk
./all/app/com.google.android.apps.tycho/22/160
./all/app/com.google.android.apps.tycho/22/160/31182.apk
./all/app/com.google.android.apps.tycho/22/480
./all/app/com.google.android.apps.tycho/22/480/31188.apk
./all/app/com.google.android.apps.tycho/22/240
./all/app/com.google.android.apps.tycho/22/240/31184.apk
./all/app/com.google.android.apps.tycho/22/320
./all/app/com.google.android.apps.tycho/22/320/31186.apk