Make RE2::Set force-enable the never_capture option.
Make RE2::Set force-enable the never_capture option.

Change-Id: If1cfddd6cd9a756269609b26e0a3b20c7c130c4d
Reviewed-on: https://code-review.googlesource.com/17810
Reviewed-by: Paul Wankadia <62d4e38bb1380f055ec4b899baa75e52af09c5f7@google.com>

google/re2,google/re2,google/re2,google/re2,google/re2