doc: add glossary.md

glossary.md

@@ -0,0 +1,16 @@
+You may also need to check https://chromium.googlesource.com/chromiumos/docs/+/master/glossary.md.
+
+* LGTM: "Looks good to me", commonly used to approve a code review.
+* PTAL: Please take a look.
+* RSLGTM: "Rubber-stamp looks good to me". The reviewer approving without doing
+  a full code review.
+* TSC: Technical Steering Committee. Detailed info see
+  [TSC](./GOVERNANCE.md#technical-steering-committee).
+* WIP: "Work In Progress" - e.g. a patch that's not finished, but may be worth
+  an early look.
+* WPT: [web-platform-tests](https://github.com/web-platform-tests/wpt)
+* godbolt: [Compiler Explorer](https://godbolt.org/) run compilers interactively
+  from your web browser and interact with the assembly. Was created by and is
+  primarily administrated by Matt Godbolt.
+* primordials: Pristine built-ins that are not effected by prototype pollution
+  and tampering with built-ins.