Fix padding of entries in .prof files

When the number of entries of a cost centre reaches 11 digits, it takes
up the whole space reserved for it and the prof file ends up looking
like:

    ... no.        entries  %time %alloc   %time %alloc

        ...
    ... 120918     978250    0.0    0.0     0.0    0.0
    ... 118891          0    0.0    0.0    73.3   80.8
    ... 11890229702412351    8.9   13.5    73.3   80.8
    ... 118903  153799689    0.0    0.1     0.0    0.1
        ...

This results in tooling not being able to parse the .prof file.  I
realise we have the JSON output as well now, but still it'd be good to
fix this little weirdness.

Original bug report and full prof file can be seen here:
<https://github.com/jaspervdj/profiteur/issues/28>.

rts/ProfilerReport.c

@@ -233,7 +233,7 @@ logCCS(FILE *prof_file, CostCentreStack const *ccs, ProfilerTotals totals,
                 max_src_len - strlen_utf8(cc->srcloc), "");
 
         fprintf(prof_file,
-                " %*" FMT_Int "%11" FMT_Word64 "  %5.1f  %5.1f   %5.1f  %5.1f",
+                " %*" FMT_Int " %11" FMT_Word64 "  %5.1f  %5.1f   %5.1f  %5.1f",
                 max_id_len, ccs->ccsID, ccs->scc_count,
                 totals.total_prof_ticks == 0 ? 0.0 : ((double)ccs->time_ticks / (double)totals.total_prof_ticks * 100.0),
                 totals.total_alloc == 0 ? 0.0 : ((double)ccs->mem_alloc / (double)totals.total_alloc * 100.0),