[FAB-4313] Add vscode settings to gitignore

Add vscode setting materials to gitignore, hence will not pollute the
source code with vscode ide.

Change-Id: I5263b8723d94cb56cc84785c4846b7838fc2cd7a
Signed-off-by: Baohua Yang <[email protected]>

Author: yeasy

.gitignore

@@ -43,3 +43,5 @@ bin/
 examples/e2e_cli/channel-artifacts/*.tx
 examples/e2e_cli/channel-artifacts/*.block
 examples/e2e_cli/crypto-config/*
+# vscode settings
+.vscode