tests: Update RISC-V hello test and stats

Update the "Hello, world!" executable for RISC-V to use the latest GNU
Linux toolchain and fix the stats accordingly.

Change-Id: I5ff3d7f4bb41b10170038b8c07492f15bb54a022
Reviewed-on: https://gem5-review.googlesource.com/3560
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
26 files changed