compiler: fix quoting of //go:linkname in error message
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/195718


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@275758 138bc75d-0d04-0410-961f-82ee72b054a4
2 files changed