mtest: make log output more suitable for console
mtest: make log output more suitable for console

Right now the same code is used to print the logs for both the console
and the text log.  Differentiating them lets the important bits of
the console output stand out, and makes the console output a bit more
readable.

jpakkane/meson,pexip/meson,pexip/meson,jpakkane/meson,QuLogic/meson,mesonbuild/meson,mesonbuild/meson,jpakkane/meson,mesonbuild/meson,jpakkane/meson,pexip/meson,QuLogic/meson,QuLogic/meson,QuLogic/meson,mesonbuild/meson,jpakkane/meson,jpakkane/meson,pexip/meson,jpakkane/meson,mesonbuild/meson,QuLogic/meson,mesonbuild/meson,jpakkane/meson,QuLogic/meson,QuLogic/meson,pexip/meson,mesonbuild/meson,QuLogic/meson,pexip/meson,mesonbuild/meson,mesonbuild/meson,QuLogic/meson,mesonbuild/meson,pexip/meson,jpakkane/meson,pexip/meson,pexip/meson,pexip/meson