[RFC] [PATCH] Add statement ranges to kernel.statement

[Stan Cox]

This adds two types of statement ranges to kernel.statement:
 kernel.statement("bio_put@fs/bio.c:*")
 kernel.statement("bio_put@fs/bio.c:212-219"

e.g. Given: probe kernel.statement("bio_put@fs/bio.c:212-219") {printf
("%s\n", pp())}
Results:
kernel.statement("bio_put@fs/bio.c:213")
kernel.statement("bio_put@fs/bio.c:212")
kernel.statement("bio_put@fs/bio.c:218")
kernel.statement("bio_put@fs/bio.c:219")
kernel.statement("bio_put@fs/bio.c:213")
kernel.statement("bio_put@fs/bio.c:212")
kernel.statement("bio_put@fs/bio.c:218")
kernel.statement("bio_put@fs/bio.c:219")

This patch converts tapsets.cxx#iterate_over_srcfile_lines into a loop
where every kernel.statement is assumed to have a line range, with :212
assumed to be the range 212-212.  The :* case explicitly sets the start
to the beginning of the function and checks when the end of the function
is reached.


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