i#1967 cron builds: build package in Appveyor builds

Adds package building in each Appveyor build.

Adds force_update for Appveyor deployment to try and get it in the same
GitHub Release as Travis.

Issue: #1967

.appveyor.yml

@@ -100,7 +100,8 @@ build_script:
   - cd build
   - echo %PATH%
   # The perl in c:\perl can't open a pipe so we use cygwin perl.
-  - c:\cygwin\bin\perl ../suite/runsuite_wrapper.pl travis use_ninja %EXTRA_ARGS%
+  # XXX i#1967: can we pass "package" only when deploying to save time?
+  - c:\cygwin\bin\perl ../suite/runsuite_wrapper.pl travis use_ninja package %EXTRA_ARGS%
 
 # Automated deployment of builds to GitHub Releases.
 # We rely on a Travis cron job to push a tag to the repo which then
@@ -117,6 +118,7 @@ deploy:
   artifact: build*/DynamoRIO*.zip
   draft: false
   prerelease: false
+  force_update: true
   on:
     branch: master
     appveyor_repo_tag: true