[review v2] gdb: Re-enable stdin for all UIs from start_event_loop

[Andrew Burgess (Code Review)]

Andrew Burgess has abandoned this change. ( https://gnutoolchain-gerrit.osci.io/r/c/binutils-gdb/+/700 )

Change subject: gdb: Re-enable stdin for all UIs from start_event_loop
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Abandoned

I've now posted this to the mailing list.
-- 
Gerrit-Project: binutils-gdb
Gerrit-Branch: master
Gerrit-Change-Id: I1e18deff2e6f4e17f7a13adce3553eb001cad93b
Gerrit-Change-Number: 700
Gerrit-PatchSet: 2
Gerrit-Owner: Andrew Burgess <andrew.burgess@embecosm.com>
Gerrit-Reviewer: Pedro Alves <palves@redhat.com>
Gerrit-MessageType: abandon