No need to include ../tools/flags in include_dirs when depending on flags target.

"flags" target does it by direct_dependent_settings which exports the
include_dirs to targets that depend on it.

Along the way fixed the indentation of experimental.gyp and v8.gyp.

BUG=None
TEST=make all
R=mtklein@google.com

Author: tfarina@chromium.org

Review URL: https://codereview.chromium.org/343283002
diff --git a/gyp/flags.gyp b/gyp/flags.gyp
index c15624b..874a4b2 100644
--- a/gyp/flags.gyp
+++ b/gyp/flags.gyp
@@ -6,8 +6,8 @@
       'target_name': 'flags',
       'type': 'static_library',
       'sources': [
-        '../tools/flags/SkCommandLineFlags.h',
         '../tools/flags/SkCommandLineFlags.cpp',
+        '../tools/flags/SkCommandLineFlags.h',
       ],
       'dependencies': [
         'skia_lib.gyp:skia_lib',