Tests failing with qemu_rx and RX architecture (Tracking)

[nashif]

Many issues are failing on RX with qemu_rx:

• tests/lib/c_lib/common
• tests/lib/c_lib/thrd
• tests/lib/cpp/libcxx

[nashif]

@duynguyenxa I noticed RX is not in the maintainer file, please add an entry.

[duynguyenxa]

Hi @nashif , sorry I just take a few days off last week for my wedding, just came back to work today. We will look into this issues and I'll create the RX in Maintainer file. Thank you