servo: Merge #19908 - Double the sccache timeout (from servo:jdm-patch-9); r=emilio

Fixes #19907.

Source-Repo: https://github.com/servo/servo
Source-Revision: 86b7af5db55ac340517318c0305dacf00208dd96

--HG--
extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear
extra : subtree_revision : c25a8ada5e20ac0d08bf7cd2eb17261ff11cc8e0

servo/etc/ci/buildbot_steps.yml

@@ -2,7 +2,7 @@ env:
   RUST_BACKTRACE: '1'
   RUSTFLAGS: -Dwarnings
   CARGO_INCREMENTAL: "0"
-  SCCACHE_IDLE_TIMEOUT: "600"
+  SCCACHE_IDLE_TIMEOUT: "1200"
 
 mac-rel-wpt1:
   - ./mach clean-nightlies --keep 3 --force