perf srcline: Add missed addr2line closes

The child_process for addr2line sets in and out to -1 so that pipes
get created. It is the caller's responsibility to close the pipes,
finish_command doesn't do it. Add the missed closes.

Fixes: b3801e791231 ("perf srcline: Simplify addr2line subprocess")
Signed-off-by: Ian Rogers <[e-mail]>
Cc: Ravi Bangoria <[e-mail]>
Cc: James Clark <[e-mail]>
Cc: Nick Desaulniers <[e-mail]>
Cc: Nathan Chancellor <[e-mail]>
Cc: Kan Liang <[e-mail]>
Cc: John Garry <[e-mail]>
Cc: Tom Rix <[e-mail]>
Cc: [e-mail]
Signed-off-by: Namhyung Kim <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

tools/perf/util/srcline.c

···
 		kill(a2l->pid, SIGKILL);
 		finish_command(a2l); /* ignore result, we don't care */
 		a2l->pid = -1;
+		close(a2l->in);
+		close(a2l->out);
 	}
 
 	free(a2l);