[8u] RFR(XS) 8231494: fix a typo in hash functions

[Liu, Xin]

Hi, Andrew,

I backported it and verified the test using hotspot/test/sanity/ExecuteInternalVMTests.java 
Here is webrev. 
https://cr.openjdk.java.net/~xliu/8231494/v1/webrev/

jdk8u-dev can apply the patch almost clean.
The only thing I changed is make ResourceHashtable::put return a Boolean value.
+  bool put(K const& key, V const& value) {
The test needs it. 

I also add label 'jdk8u-fix-request' to JDK-8055283

Thanks,
--lx

On 9/26/19, 10:32 AM, "jdk8u-dev on behalf of Liu, Xin" <jdk8u-dev-bounces at openjdk.java.net on behalf of xxinliu at amazon.com> wrote:

    Hi, reviewer,
    
    Could you review this trivial change?  I think it’s a typo and get better hash function.
    JBS: https://bugs.openjdk.java.net/browse/JDK-8231494
    Webrev: https://cr.openjdk.java.net/~xliu/8231494/webrev/
    
    I didn’t backport JDK-8055283 because it’s not necessary.
    
    Thanks,
    --lx