[release] goTools: don't fail gocode installation if gocode is not already running

Fixes #355
Fixes #362

Change-Id: Ifdf229ce52a6a4b1a2e4f0a28ac5596405ff4c56
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/242780
Reviewed-by: Hyang-Ah Hana Kim <[email protected]>
(cherry picked from commit db1d1b3)
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/243898
Reviewed-by: Rebecca Stambler <[email protected]>

Author: stamblerre

src/goTools.ts

@@ -194,7 +194,7 @@ export const allToolsInformation: { [key: string]: Tool } = {
 					return `Installing gocode aborted as existing process cannot be closed. Please kill the running process for gocode and try again.`;
 				}
 			} catch (err) {
-				return `Failed to close gocode process: ${err}.`;
+				// This may fail if gocode isn't already running.
 			}
 			return '';
 		},