D5591: Small fixes in cmake server logic

[Anton Anikin]

antonanikin created this revision.

REVISION SUMMARY
  The patch fixes:
  
  1. Error message about `QLocalSocket::ServerNotFoundError` when we try to connect to socket which is not already created by cmake server process.
  2. Error message about cmake server process crashing when we kill it in the destructor.

TEST PLAN
  Tested on master branch

REPOSITORY
  R32 KDevelop

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D5591

AFFECTED FILES
  projectmanagers/cmake/cmakeserver.cpp

To: antonanikin, apol
Cc: kdevelop-devel
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