PkgEvalJob: Make log upload errors non-fatal.

src/jobs/PkgEvalJob.jl

@@ -466,7 +466,7 @@ function process_results!(job::PkgEvalJob, builds::Dict, all_tests::DataFrame, r
                                            "x-amz-acl"  => "public-read",
                                            "headers"    => Dict("Content-Type"=>"text/plain; charset=utf-8")))
                     catch err
-                        nanosoldier_error("failed to upload test log", err)
+                        @error "Failed to upload test log" exception=(err, catch_backtrace())
                     end
                 end
             end