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

[Petr Tesarik]

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 at suse.cz>
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