i965: Tidy shader time printing code by using printf's field widths.

i965: Tidy shader time printing code by using printf's field widths.

We can use %-6s%-6s rather than manually counting characters, resulting
in much more readable code.

This necessitates a small secondary change: using "total fs16" and ""
now causes the "" string to be padded out to 6 characters, resulting in
too much whitespace.  Splitting it into "total" and "fs16" produces the
same output as before.

Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>