tools/license.sh: add more allowed license combination

This is to handle the new dev dependencies added during our
transition to bundle the extension using webpack.

{
 "name": "atob",
 "version": "2.1.2",
 "license": "(MIT OR Apache-2.0)",
 "url": "git://git.coolaj86.com/coolaj86/atob.js.git",
 "verndor": "https://git.coolaj86.com/coolaj86/atob.js.git",
 "vendorName": "AJ ONeal"
}
{
 "name": "pako",
 "version": "1.0.11",
 "license": "(MIT AND Zlib)",
 "url": "https://github.com/nodeca/pako.git",
 "verndor": "https://github.com/nodeca/pako",
 "vendorName": "Unknown"
}
{
 "name": "sha.js",
 "version": "2.4.11",
 "license": "(MIT AND BSD-3-Clause)",
 "url": "git://github.com/crypto-browserify/sha.js.git",
 "verndor": "https://github.com/crypto-browserify/sha.js",
 "vendorName": "Dominic Tarr"
}

Apache-2.0, MIT, and BSD-3-Clause are already allowed licensed.
Zlib (zlib/libpng) is in the 'notice' licenses category
https://opensource.google/docs/thirdparty/licenses/#notice.

Note: the above three are dev dependencies, so their notices
may not appear in the license info shipped with the extension.

Change-Id: Ie93cdf59a36beb4868990ca5ef9c55f4fda7f64f
Reviewed-on: https://go-review.googlesource.com/c/vscode-go/+/245322
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
diff --git a/tools/license.sh b/tools/license.sh
index 9647e1f..8750bca 100755
--- a/tools/license.sh
+++ b/tools/license.sh
@@ -40,6 +40,9 @@
   "Unlicense": 1,
   "0BSD": 1,
   "(Unlicense OR Apache-2.0)": 1,
+  "(MIT OR Apache-2.0)": 1,
+  "(MIT AND Zlib)": 1,
+  "(MIT AND BSD-3-Clause)": 1,
 } as $allowed_licenses |
 {
   "json-schema@0.2.3": 1,