GN: link executables with -rdynamic on Linux.

-rdynamic makes sure the executable exposes all its symbols, which allows things like DM's built-in stack trace dumper to show symbols instead of just addresses.  We do this in GYP too.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2339983005

Review-Url: https://codereview.chromium.org/2339983005
1 file changed