fix #14015: Syntax error for __has_include with --std=gnu99
#18616
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__has_include with --std=gnu99
#18616
| Job | Run time |
|---|---|
| 9s | |
| 43s | |
| 24s | |
| 18s | |
| 27s | |
| 1m 3s | |
| 1m 18s | |
| 1m 15s | |
| 1m 5s | |
| 1m 11s | |
| 1m 2s | |
| 1m 3s | |
| 9m 58s |