x11/sirula: Mark BROKEN

Fails to build with:

error: expected one of (, ., ::, ;, ?, }, or an operator,
found :

 -->
/wrkdirs/usr/ports/x11/sirula/work/sirula-1.0.0/cargo-crates/osstrtools-0.2.2/src/lib.rs:754:42
  |

754 | unsafe { (bytes as *const _).cast:() }

|                                          ^ expected one of
       7 possible tokens

error: could not compile osstrtools (lib) due to previous error

Sponsored by: The FreeBSD Foundation