nolibc changes for 6.14

Changes
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* Test riscv32 support
* Print an error message if toolchain for run-tests.sh is missing
selftests/nolibc: add configurations for riscv32

nolibc already supports riscv32. Wire it up in the testsuite.

Link: https://lore.kernel.org/r/20241221-nolibc-rv32-v1-6-d9ef6dab7c63@weissschuh.net
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
2 files changed