Revert 237048 "When building with component=shared_library on li..."

> When building with component=shared_library on linux, add -rdynamic
> 
> This allows for WTF's BACKTRACE() macro to symbolize stacktraces.
> 
> BUG=none
> R=glider@chromium.org
> 
> Review URL: https://codereview.chromium.org/83553002

TBR=jochen@chromium.org

Review URL: https://codereview.chromium.org/85523003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@237060 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 237060