do a little bit of work to try confirm that the git repo found is actually a julia repo before running Core.Compiler test
#485
| Job | Run time |
|---|---|
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| 27m 32s | |
| 15m 26s | |
| 9m 32s | |
| 27m 34s | |
| 9m 45s | |
| 9m 36s | |
| 27m 33s | |
| 7m 46s | |
| 12m 26s | |
| 29m 20s | |
| 7m 52s | |
| 15m 13s | |
| 3h 27m 18s |