[tip:perf/core] perf tools: Add missing header to color.c

[tip-bot for Arnaldo Carvalho de Melo]

Commit-ID:  16b7c9bda52a593fb3a7e3a9848d7596777a73f5
Gitweb:     http://git.kernel.org/tip/16b7c9bda52a593fb3a7e3a9848d7596777a73f5
Author:     Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
AuthorDate: Thu, 7 Jul 2016 11:37:08 -0300
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Tue, 12 Jul 2016 15:19:58 -0300

perf tools: Add missing header to color.c

It uses isatty(), so needs unistd.h, include it.

Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Wang Nan <wangnan0@xxxxxxxxxx>
Link: http://lkml.kernel.org/n/tip-ivwuz8f68tb3sdcpguo9wmvx@xxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/color.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/util/color.c b/tools/perf/util/color.c
index 1210ba5..47a34b5 100644
--- a/tools/perf/util/color.c
+++ b/tools/perf/util/color.c
@@ -3,6 +3,7 @@
 #include "config.h"
 #include "color.h"
 #include <math.h>
+#include <unistd.h>
 
 int perf_use_color_default = -1;