Import upstream change: CookieHandler does not work with localhost

Upstream change:

    7169142: CookieHandler does not work with localhost
    Summary: Add .local to derived effective hostnames without dot
    Reviewed-by: chegar

    http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/rev/42f9ad39bf42

This change depends on OpenJDK change 5c1f90dd0405 (libcore change
505d890c)

Bug: 29067535
Test: libcore.java.net.AbstractCookiesTest
Change-Id: Iaba4f6f4b666d55167748e4e35ed57cc97eb9ba4