tools arch x86: Grab a copy of the file containing the MSR numbers

We'll use it to generate a table and then convert the
msr:{read,write}_msr 'msr' option in things like perf trace, script,
etc.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-y1f4s0y1s43d4drh7pd2huzn@git.kernel.org


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>