CompatHelper: bump compat for "LLVM" to "3.0"
Created by: github-actions[bot]
This pull request changes the compat entry for the LLVM
package from 1.5
to 1.5, 3.0
.
This keeps the compat entries for earlier versions.
Note: I have not tested your package with this new compat entry. It is your responsibility to make sure that your package tests pass before you merge this pull request.