ci: Add note that this assumes a fresh git clone

MarcoFalke · MarcoFalke · commit faeacf32691a · 2019-08-15T11:13:10.000-04:00
diff --git a/ci/README.md b/ci/README.md
@@ -22,3 +22,4 @@ To run the test stage,
 ```
 
 Be aware that the tests will be build and run in-place, so please run at your own risk.
+If the repository is not a fresh git clone, you might have to clean files from previous builds or test runs first.

Original file line number	Diff line number	Diff line change
`@@ -22,3 +22,4 @@ To run the test stage,`
`22`	`22`	```
`23`	`23`
`24`	`24`	`Be aware that the tests will be build and run in-place, so please run at your own risk.`
	`25`	`+If the repository is not a fresh git clone, you might have to clean files from previous builds or test runs first.`