[Libvirt-ci] Build failed in Jenkins: libvirt-build » libvirt-fedora-27 #32

See <https://ci.centos.org/job/libvirt-build/systems=libvirt-fedora-27/32/display/redirect?page=changes>

Changes:

[abologna] tests: Reuse qemucapabilities data for qemucaps2xml

[abologna] tests: Add more tests to qemucaps2xml

[abologna] qemu: Drop QEMU_CAPS_ENABLE_KVM

[abologna] qemu: Avoid probing non-native binaries all the time

[abologna] qemu: Clarify QEMU_CAPS_KVM

[abologna] qemu: Don't check for /dev/kvm presence

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Started by upstream project "libvirt-build" build number 32
originally caused by:
 Started by an SCM change
[EnvInject] - Loading node environment variables.
Building remotely on libvirt-fedora-27 (libvirt) in workspace <https://ci.centos.org/job/libvirt-build/systems=libvirt-fedora-27/ws/>
 > git rev-parse --is-inside-work-tree # timeout=10
Fetching changes from the remote Git repository
 > git config remote.origin.url https://github.com/libvirt/libvirt.git # timeout=10
Fetching upstream changes from https://github.com/libvirt/libvirt.git
 > git --version # timeout=10
 > git fetch --tags --progress https://github.com/libvirt/libvirt.git +refs/heads/*:refs/remotes/origin/*
Checking out Revision 2f8b91ee74ff617aba322d034119427cad977af9 (refs/remotes/origin/master)
 > git config core.sparsecheckout # timeout=10
 > git checkout -f 2f8b91ee74ff617aba322d034119427cad977af9
Commit message: "qemu: Don't check for /dev/kvm presence"
 > git rev-list --no-walk 11e1f11dd34f2688169c63c13ea8d99a64724369 # timeout=10
Cleaning workspace
 > git rev-parse --verify HEAD # timeout=10
Resetting working tree
 > git reset --hard # timeout=10
 > git clean -fdx # timeout=10
[libvirt] $ /bin/sh -xe /tmp/jenkins5761898546721447301.sh
+ mkdir build
mkdir: cannot create directory ‘build’: File exists
Build step 'Execute shell' marked build as failure