chainlint.pl: fix incorrect CPU count on Linux SPARC
On SPARC systems running Linux, individual processors are denoted with
"CPUnn:" in /proc/cpuinfo instead of the usual "processor : NN". As a
result, the regexp in ncores() matches 0 times. Address this shortcoming
by extending the regexp to also match lines with "CPUnn:".
Signed-off-by: John Paul Adrian Glaubitz <redacted>
[es: simplified regexp; tweaked commit message] Signed-off-by: Eric Sunshine <redacted> Tested-by: John Paul Adrian Glaubitz <redacted> Signed-off-by: Junio C Hamano <redacted>