[Bazel] Fix `--warn-backrefs` errors in `Analysis` target (#170357)
Commit b262785 introduced a separate `AnalysisFpExc` target to try to
workaround the lack of a bazel equivalent of single source file
properties. However, this introduces backref errors when
`--warn-backrefs` is enabled.
This change alternatively just adds the `-ftrapping-math` copt to the
entire `Analysis` target.
Fix suggested by @rocallahan.