[PATCH] perf: Skip running the feature tests for 'make install-doc'

[Rui Teng <rui.teng@linux.vnet.ibm.com>]

It is a requirement from the perf todo list:
The feature tests should be performed only when a file that needs those tests,
or at least only when some .c or .h file will be rebuilt
    An initial step would be for 'make install-doc' not to run the feature tests,
    there it is not needed at all.

By adding 'install-doc' to the NON_CONFIG_TARGETS, it will skip running the
feature tests for such target. The Auto-detecting system features list will
not be displayed:

$ make install-doc
  BUILD:   Doing 'make -j2' parallel build
  SUBDIR   Documentation
make[2]: Nothing to be done for 'install'.

Signed-off-by: Rui Teng <rui.teng@linux.vnet.ibm.com>
---
 tools/perf/Makefile.perf | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 2d90875..9c1dac6 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -165,7 +165,7 @@ SUBCMD_DIR	= $(srctree)/tools/lib/subcmd/
 # non-config cases
 config := 1
 
-NON_CONFIG_TARGETS := clean TAGS tags cscope help
+NON_CONFIG_TARGETS := clean TAGS tags cscope help install-doc
 
 ifdef MAKECMDGOALS
 ifeq ($(filter-out $(NON_CONFIG_TARGETS),$(MAKECMDGOALS)),)
-- 
2.7.4