qmakemanager: avoid "style of line directive is a GCC extension" warnings

1 job for !97 with preventgcclinedirectiveextensionwarning in 60 minutes and 1 second (queued for 32 minutes and 44 seconds)
detached
Status Job ID Name Coverage
  Build
failed #30230
linux kf5-qt5 qt5.12

01:00:01

 
Name Stage Failure
failed
linux kf5-qt5 qt5.12 Build The script exceeded the maximum execution time set for the job
qt.qpa.events: Event | XCB_PROPERTY_NOTIFY(28) | sequence: 400
90/123 Test #90: test_codecompletion ..................... Passed 63.64 sec
Start 91: test_assistants
kf5.kinit.klauncher: new app ":1.54"
kf5.kinit.klauncher: new app "org.kdevelop.kdevplatform-lock-b60e461c-5994-42ee-a112-8ee90f20b001"
qt.qpa.events: Event | XCB_CLIENT_MESSAGE(33) | sequence: 400
qt.qpa.events: Event | XCB_CLIENT_MESSAGE(33) | sequence: 400
Pulling docker image gitlab/gitlab-runner-helper:x86_64-ac8e767a ...
ERROR: Job failed: execution took longer than 1h0m0s seconds