Rollup merge of rust-lang#62722 - alexcrichton:unlimit-tools, r=pietroalbini

ci: Bump time limit of tools builder on PRs

This should give it enough time to finish instead of being killed after
an hour.

Author: Mark-Simulacrum

.azure-pipelines/pr.yml

@@ -21,6 +21,7 @@ jobs:
         IMAGE: mingw-check
 
 - job: LinuxTools
+  timeoutInMinutes: 600
   pool:
     vmImage: ubuntu-16.04
   steps: