hg: jdk9/dev/jdk: 8032220: Files.createDirectories throws exception with confusing message for root directories that exist

[alan.bateman at oracle.com]

Changeset: 8ff79b0e3503
Author:    alanb
Date:      2014-01-21 09:33 +0000
URL:       http://hg.openjdk.java.net/jdk9/dev/jdk/rev/8ff79b0e3503

8032220: Files.createDirectories throws exception with confusing message for root directories that exist
Reviewed-by: chegar

! src/share/classes/java/nio/file/Files.java
! src/solaris/classes/sun/nio/fs/UnixFileSystemProvider.java
! src/windows/classes/sun/nio/fs/WindowsFileSystemProvider.java
! test/java/nio/file/Files/Misc.java