Rollup merge of #70355 - GuillaumeGomez:cleanup-e0454, r=Dylan-DPC

Clean up E0454

r? @Dylan-DPC
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Mazdak Farrokhzad 2020-03-24 21:32:34 +01:00 committed by GitHub
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@ -1,4 +1,6 @@
A link name was given with an empty name. Erroneous code example:
A link name was given with an empty name.
Erroneous code example:
```compile_fail,E0454
#[link(name = "")] extern {}