go/internal/gccgoimporter: TestInstallationImporter broken with tip gccgo [1.16 backport] #47610
Description
@ianlancetaylor requested issue #44425 to be considered for backport to the next 1.16 minor release.
@gopherbot Please backport to 1.16
This is fixed on tip, but causes a test failure on 1.16 when gccgo is installed. The fix is trivial (https://golang.org/cl/294290) so let's backport it.