perf symbols: Move fprintf routines to separate object file

To disentangle symbol printing from all the code related to symbol
tables, resolution of addresses to symbols, etc.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-eik9g3hbtdc7ddv57f1d4v3p@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/python-ext-sources

@@ -23,3 +23,4 @@ util/strlist.c
 util/trace-event.c
 ../lib/rbtree.c
 util/string.c
+util/symbol_fprintf.c