Allow C++ exceptions on debugd.

debugd uses try/catch to interact with dbus-c++.

BUG=chromium:386443
TEST=emerge-link platform2 (with the changes to common.gypi)
CQ-DEPEND=CL:205242

Change-Id: Ia176d850895ae5156a67973ec08f1bab9dcedde1
Reviewed-on: https://chromium-review.googlesource.com/205233
Reviewed-by: Bertrand Simonnet <bsimonnet@chromium.org>
Commit-Queue: Alex Deymo <deymo@chromium.org>
Tested-by: Alex Deymo <deymo@chromium.org>
diff --git a/debugd.gyp b/debugd.gyp
index 31cf54b..d49da5f 100644
--- a/debugd.gyp
+++ b/debugd.gyp
@@ -9,6 +9,8 @@
         'libchrome-<(libbase_ver)',
         'libchromeos-<(libbase_ver)',
       ],
+      # debugd uses try/catch to interact with dbus-c++.
+      'enable_exceptions': 1,
     },
     'defines': [
       'USE_CELLULAR=<(USE_cellular)',