Move even more data from .data to .rodata section

Move more data from .data to .rodata section so that they can be shared
between different library instances on mobile / android.

In particular, the following data was moved:
- CSSGrammar's star variables
- WorkerDebuggerAgent::debuggerTaskMode string
- Ranges arrays in Font class

This also gets rid of 1 relocation according to relinfo.

R=abarth
BUG=249746

Review URL: https://codereview.chromium.org/28333004

git-svn-id: svn://svn.chromium.org/blink/trunk@160203 bbb929c8-8fbe-4397-9dbb-9b2b20218538