RFR: JDK-8068803:Performance of LocalDate.plusDays could be better

[nadeesh tv]

Hi all,

Please review  a  fix for https://bugs.openjdk.java.net/browse/JDK-8068803
 web rev :   http://cr.openjdk.java.net/~ntv/8068803/webrev.00/

Special thanks for Stephen for  providing the source code patch

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Thanks and Regards,
Nadeesh TV