Contrary to the existing "fate-checkasm", this always prints the
tool output, and runs all tests at once instead of splitting it up
per target group. This is more useful when the user expects to
look directly at the tool output, instead of being part of a full
fate run.

(On failure with the regular "make fate-checkasm" targets, none of
the tool output is printed, but stored in files. If run with reporting
set up to the FATE website, the individual failures are uploaded there,
but if it is run in some sort of other CI setup, the intermediate files
might not be available afterwards for inspection.)
Signed-off-by: Martin Storsjö <martin@martin.st>