[2.7] Cache externals, depending on changes to PCbuild (GH-3308) (#3365)

zware · web-flow · commit fef3ddbbcc40 · 2017-09-05T18:01:49.000-07:00
(cherry picked from commit f801322)
diff --git a/.github/appveyor.yml b/.github/appveyor.yml
@@ -5,6 +5,8 @@ branches:
     - master
     - /\d\.\d/
     - buildbot-custom
+cache:
+  - externals -> PCbuild\*
 build_script:
 - cmd: PCbuild\build.bat -e
 - cmd: PCbuild\python.exe -m test.pythoninfo
