Fix Mac clang linker

tools/flags/SkCommonFlags.cpp

Index: tools/flags/SkCommonFlags.cpp
diff --git a/tools/flags/SkCommonFlags.cpp b/tools/flags/SkCommonFlags.cpp
index 1caffd54d6a5b58bca2cd481a6a618c0d57c6bf2..90a512074391ed7b34228e9bdad0e55fed66c86c 100644
--- a/tools/flags/SkCommonFlags.cpp
+++ b/tools/flags/SkCommonFlags.cpp
@@ -21,6 +21,8 @@ DEFINE_string(images, "", "List of images and/or directories to decode. A direct
 DEFINE_string(colorImages, "", "List of images and/or directories to decode with color correction. "
                                "A directory with no images is treated as a fatal error.");
 
+DEFINE_bool(simpleCodec, false, "Runs of a subset of the codec tests.");

[scroggo, 2016/06/21 16:16:18]

nit: might be nice to specify the subset.

[msarett, 2016/06/21 16:27:17]

Done.

+
 DEFINE_string2(match, m, nullptr,
                "[~][^]substring[$] [...] of GM name to run.\n"
                "Multiple matches may be separated by spaces.\n"