[Crash-utility] [PATCH 3/11] Implement percpu variables for "p"

Add per-cpu specifications to the "p" command. This allows to specify CPUs for a per-cpu symbol after a colon. Keep in mind that a colon can be part of a valid C expression, e.g. ':' or the ternary operator, so if the part before the colon is not a symbol, the colon must be restored. Fortunately, a symbol name followed by a colon cannot start a valid C expression, so there is never any ambiguity. Signed-off-by: Petr Tesarik <ptesarik(a)suse.cz&gt;