Add GYP target for sk_tool_utils.* component.

gyp/bench.gyp

Index: gyp/bench.gyp
diff --git a/gyp/bench.gyp b/gyp/bench.gyp
index 15927e641300d012b57ded829cbfbad7fe72958b..6f33d8587fa0ec19bc9f3e01bcfc3a7a57147ffd 100644
--- a/gyp/bench.gyp
+++ b/gyp/bench.gyp
@@ -15,6 +15,7 @@
         'flags.gyp:flags',
         'jsoncpp.gyp:jsoncpp',
         'resources.gyp:resources',
+        'sk_tool_utils.gyp:sk_tool_utils',
         'skia_lib.gyp:skia_lib',
       ],
       'sources': [
@@ -24,7 +25,6 @@
         '../bench/GMBench.h',
         '../bench/ResultsWriter.cpp',
         '../bench/benchmain.cpp',
-        '../tools/sk_tool_utils.cpp',
       ],
       'conditions': [
         ['skia_gpu == 1',
@@ -66,7 +66,6 @@
       'include_dirs': [
         '../src/core',
         '../src/gpu',
-        '../tools',
       ],
       'direct_dependent_settings': {
         'include_dirs': ['../bench'],