[tip:perf/core] perf hists: Add support for header span

Commit-ID: 29659ab4e7d02c08d8f2d08db0b0f708bd8b6771 Gitweb: http://git.kernel.org/tip/29659ab4e7d02c08d8f2d08db0b0f708bd8b6771 Author: Jiri Olsa AuthorDate: Sun, 7 Aug 2016 17:28:30 +0200 Committer: Arnaldo Carvalho de Melo CommitDate: Tue, 23 Aug

[tip:perf/core] perf hists: Add support for header span

Commit-ID: 29659ab4e7d02c08d8f2d08db0b0f708bd8b6771 Gitweb: http://git.kernel.org/tip/29659ab4e7d02c08d8f2d08db0b0f708bd8b6771 Author: Jiri Olsa AuthorDate: Sun, 7 Aug 2016 17:28:30 +0200 Committer: Arnaldo Carvalho de Melo CommitDate: Tue, 23 Aug 2016 15:37:33 -0300 perf hists: Add