[Icons] Missing MeetingRoom and NoMeetingRoom icons?

[JSchneidler]

• This is a v1.x issue (v0.x is no longer maintained).
• I have searched the issues of this repository and believe that this is not a duplicate.

Expected Behavior

MeetingRoom and NoMeetingRoom should exist as components in the @material-ui/icons package.

Current Behavior

MeetingRoom and NoMeetingRoom are not recognized as imports from the icons package nor do they exist in the source packages/material-ui-icons/src

Steps to Reproduce (for bugs)

N/A

Context

I do not see this icon referenced anywhere, including why it isn't added. Am I missing something or did someone just forget to add it?

Your Environment

Tech	Version
Material-UI	v1.0.0
React	16.3.2
browser	Chrome 66

[mbrookes]

Dupe of #11290