src/pickProcess.ts: fix platform process commands

Somehow the pick process commands ended up not being matched
with the correct platform.

Change-Id: Ie881221e56ccfde4be480fde8bbbb69fe6a88164
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/287773
Trust: Suzy Mueller <suzmue@golang.org>
Run-TryBot: Suzy Mueller <suzmue@golang.org>
TryBot-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
diff --git a/src/pickProcess.ts b/src/pickProcess.ts
index b2f4077..2eea995 100644
--- a/src/pickProcess.ts
+++ b/src/pickProcess.ts
@@ -46,13 +46,13 @@
 	let processCmd: ProcessListCommand;
 	switch (process.platform) {
 		case 'win32':
-			processCmd = psDarwinCommand;
+			processCmd = wmicCommand;
 			break;
 		case 'darwin':
-			processCmd = psLinuxCommand;
+			processCmd = psDarwinCommand;
 			break;
 		case 'linux':
-			processCmd = wmicCommand;
+			processCmd = psLinuxCommand;
 			break;
 		default:
 			// Other operating systems are not supported.