Auto merge of #56951 - oli-obk:auto_toolstate_issue, r=kennytm
Auto merge of #56951 - oli-obk:auto_toolstate_issue, r=kennytm

Automatically open an issue when a tool breaks

cc @nikomatsakis

fixes https://github.com/rust-lang-nursery/rust-toolstate/issues/6

documentation about issue opening via the github api: https://developer.github.com/v3/issues/#create-an-issue

aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust