tests: lib: cbprintf_package: Hande riscv32 case

Long double test fails on riscv32 for unknown reason. Previously,
testcase.yaml was excluding whole test. Removed that and added
skipping in the code so that rest of the suite is executed.

Signed-off-by: Krzysztof Chruscinski <krzysztof.chruscinski@nordicsemi.no>
2 files changed