qt5.git integration failed because 'Project ERROR: Cannot determine clang version at /usr/local/libclang-4.0.' in qttools

agent:2018/01/10 21:59:43 build.go:421: Executing instruction 18 of 28 - ExecuteCommand
agent:2018/01/10 21:59:43 build.go:445: [/home/qt/work/install/bin/qmake INSTALL_PREFIX=/home/qt/work/install /home/qt/work/qt/qttools] 600
Info: creating stash file /home/qt/work/qt/qttools/.qmake.stash
Project ERROR: Cannot determine clang version at /usr/local/libclang-4.0.
Build log: https://testresults.qt.io/logs/qt/qttools/33c7f69ff704a45527330af48c20299a8983665e/LinuxUbuntu_16_04x86_64LinuxQEMUarm64GCCqtci-linux-Ubuntu-16.04-x86_64-2-133fceRelease/5eef2616e5db8795232fee585062dbc262c520fc/build_1515621449/log.txt.gz

Details: https://testresults.qt.io/coin/integration/qt/qt5/tasks/1515621352

Tested changes (refs/builds/qtci/dev/1515621351):
https://codereview.qt-project.org/#/q/4c94a081f837f0b3e3abd1d3bb8efdf4ffd39a9c,n,z Merge remote-tracking branch 'origin/5.10' into dev
https://codereview.qt-project.org/#/q/54aec083f897f4fa2e08617f7cba15bd357c9111,n,z Update submodules on 'dev' in qt5