Pending a better fix, mark broken when the RE2 option is enabled.
Recent versions of devel/re2 install headers that result in error
messages like so:

/usr/local/include/re2/re2.h:915:5: error: no matching function for call to 'call_once'

std::call_once(once_, &LazyRE2::Init, this);
^~~~~~~~~~~~~~

No change to the default package, so no PORTREVISION bump.

PR: 219239
Submitted by: mail+freebsd@gerritbeine.de, w.schwarzenfeld@utanet.at