RFR (): JDK-8228503: Rename "rs_lengths" to "rs_length" in ergo code

[Kim Barrett]

> On Jul 25, 2019, at 9:55 AM, Thomas Schatzl <thomas.schatzl at oracle.com> wrote:
> 
> […]
> CR:
> https://bugs.openjdk.java.net/browse/JDK-8228503
> Webrev:
> http://cr.openjdk.java.net/~tschatzl/8228503/webrev/
> Testing:
> hs-tier1-3
> 
> Thanks,
>  Thomas

Looks good.

------------------------------------------------------------------------------
src/hotspot/share/gc/g1/g1Policy.cpp
 304 G1Policy::calculate_young_list_target_length(size_t rs_length,
 305                                                     uint base_min_length,
...

[pre-existing] Unusual indentation of parameters.

------------------------------------------------------------------------------