appveyor: Cache meson's wrap downloads
This makes us less reliant on wrap-db (and reduces the amount of
downloading that goes on during the build).
Closes: https://gitlab.freedesktop.org/mesa/mesa/issues/1936
Acked-by: Eric Engestrom <eric.engestrom@intel.com>
diff --git a/appveyor.yml b/appveyor.yml
index 6c1bd37..3a24688 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -38,6 +38,7 @@
- '%LOCALAPPDATA%\pip\Cache -> appveyor.yml'
- win_flex_bison-2.5.15.zip
- llvm-5.0.1-msvc2017-mtd.7z
+- subprojects\packagecache -> subprojects\*.wrap
os: Visual Studio 2017