Bug 1611231 - Update in-tree sccache to fix -frewrite-includes bustage. r=froydnj

Differential Revision: https://phabricator.services.mozilla.com/D60878

--HG--
extra : moz-landing-system : lando

taskcluster/ci/fetch/toolchains.yml

@@ -342,7 +342,7 @@ sccache:
         type: git
         repo: https://github.com/mozilla/sccache
         # 0.2.12 release + a handful of fixes
-        revision: 35804095d3cf2e43df1efbfbc29c8d6ce49f1fe7
+        revision: e59cc28cf37254e182ede79070384f8166b52f8e
 
 openssl-1.1.0g:
     description: openssl 1.1.0g source code