Add more info to the kprof and fix a big

In real use, turns out we want that PC. We don't want to
merge the common functions from the kernel either.
We may even decide to stop the >> 3 on the PC, depending.
Memory is cheap.

Fix a bug that came up because of dealing with snprintf behavior,
long story.

Signed-off-by: Ronald G. Minnich <rminnich@google.com>