hg: kulla/dev/langtools: Per JShellTool review, use Files.newBufferedWriter. Also, related, change resolveUserHome to return a Path 'toPathResolvingUserHome'

[robert.field at oracle.com]

Changeset: f2b74c96cb01
Author:    rfield
Date:      2015-09-08 10:51 -0700
URL:       http://hg.openjdk.java.net/kulla/dev/langtools/rev/f2b74c96cb01

Per JShellTool review, use Files.newBufferedWriter.  Also, related, change resolveUserHome to return a Path 'toPathResolvingUserHome'

! src/jdk.jshell/share/classes/jdk/internal/jshell/tool/JShellTool.java