Bug 1082265 - Rewrite split-profile.pl in python.

This adds arguments for the paths to jprof, the program being profiled,
and the jprof profile itself, so I don't need to modify my local copy of
split-profile.pl to fix those.

DONTBUILD

--HG--
extra : transplant_source : %97%D5%A6%1C%A86%5E%AC%F7%FB%A7%8D%B0L%1D%17%FDK%EA%9F