This is mainly just to match what we have for arm64.
The test failures before and after this change are all for the long
double variant, which this change doesn't touch. (The problem there is
that clang is calling `__fixtfdi` for the cast in lrintl(), but that
doesn't respect the current rounding mode, which lrintl() is required
to do. `#pragma STDC FENV_ACCESS ON` doesn't fix this, so there's going
to be some llvm work needed to fix this.)
I've replaced the ASSERTs with EXPECTs in the relevant test to ensure
we're checking all the other assertions despite the `long double`
failures.
Test: bionic-unit-tests-static
Change-Id: Ia24bf21619631b6f8b3b607d30536011bb4cd826
