dbus-bindings: Fix include path.

chromeos-dbus-bindings was moved to a subdirectory. In order for the
import path to import headers with chromeos-dbus-bindings/*, we need to
add the parent directory to the include directories.

BUG=chromium:515556
TEST=`emerge-gizmo chromeos-dbus-bindings` works.

Change-Id: I97f38fcdb4f94f57cbdf896a76c97f13f031a2a6
diff --git a/chromeos-dbus-bindings/chromeos-dbus-bindings.gyp b/chromeos-dbus-bindings/chromeos-dbus-bindings.gyp
index 94feb24..57ab37a 100644
--- a/chromeos-dbus-bindings/chromeos-dbus-bindings.gyp
+++ b/chromeos-dbus-bindings/chromeos-dbus-bindings.gyp
@@ -14,6 +14,7 @@
       '-fno-strict-aliasing',
       '-Woverloaded-virtual',
     ],
+    'include_dirs': ['..'],
   },
   'targets': [
     {