GitHub pull request #3431 of commit 8ed08d0ea48549f5683e1097fa7f76ffc724b20f, no merge conflicts.sha1origin/pr/3431/mergeghprbActualCommit8ed08d0ea48549f5683e1097fa7f76ffc724b20fghprbActualCommitAuthorghprbActualCommitAuthorEmailghprbAuthorRepoGitUrlhttps://github.com/chenhengqi/bcc.gitghprbTriggerAuthorghprbTriggerAuthorEmailghprbTriggerAuthorLoginyonghong-songghprbTriggerAuthorLoginMention@yonghong-songghprbPullId3431ghprbTargetBranchmasterghprbSourceBranchfix-ext4dist-no-helpGIT_BRANCHfix-ext4dist-no-helpghprbPullAuthorEmailchenhengqi@outlook.comghprbPullAuthorLoginchenhengqighprbPullAuthorLoginMention@chenhengqighprbPullDescriptionGitHub pull request #3431 of commit 8ed08d0ea48549f5683e1097fa7f76ffc724b20f, no merge conflicts.ghprbPullTitlelibbpf-tools: parse -h optionghprbPullLinkhttps://github.com/iovisor/bcc/pull/3431ghprbPullLongDescription`ext4dist` did not parse `-h` option, this PR fixes it.\r\n\r\n```\r\n$ sudo ./ext4dist -h\r\n./ext4dist: invalid option -- 'h'\r\nTry `ext4dist --help' or `ext4dist --usage' for more information.\r\n```\r\nSigned-off-by: Hengqi Chen <chenhengqi@outlook.com>ghprbCommentBody[buildbot, test this please]ghprbGhRepositoryiovisor/bccghprbCredentialsId6d3daf13-69b8-48b1-9c8f-ec5353264113false<a title="libbpf-tools: parse -h option" href="https://github.com/iovisor/bcc/pull/3431">PR #3431</a>: libbpf-tools: parse -h option#98514706827460664bcc-pr #985985false9857889SUCCESS1621373505393https://buildbot.iovisor.org/jenkins/user/danobi/my-views/view/all/job/bcc-pr/985/git985https://buildbot.iovisor.org/jenkins/user/danobi/my-views/view/all/job/bcc-pr/label=fc25/985/985https://buildbot.iovisor.org/jenkins/user/danobi/my-views/view/all/job/bcc-pr/label=fc26/985/985https://buildbot.iovisor.org/jenkins/user/danobi/my-views/view/all/job/bcc-pr/label=fc27/985/985https://buildbot.iovisor.org/jenkins/user/danobi/my-views/view/all/job/bcc-pr/label=fc28/985/985https://buildbot.iovisor.org/jenkins/user/danobi/my-views/view/all/job/bcc-pr/label=ubuntu1604/985/985https://buildbot.iovisor.org/jenkins/user/danobi/my-views/view/all/job/bcc-pr/label=ubuntu1710/985/985https://buildbot.iovisor.org/jenkins/user/danobi/my-views/view/all/job/bcc-pr/label=ubuntu1804/985/