hg: jdk9/sandbox/jdk: 8171452: (ch) linux io_util_md: Operation not supported exception after 8168628

[chris.hegarty at oracle.com]

Changeset: 8b55846dd69d
Author:    bpb
Date:      2016-12-20 10:11 -0800
URL:       http://hg.openjdk.java.net/jdk9/sandbox/jdk/rev/8b55846dd69d

8171452: (ch) linux io_util_md: Operation not supported exception after 8168628
Summary: On Linux, fall back to ftruncate64() if fallocate64() fails
Reviewed-by: mdoerr, alanb

! src/java.base/unix/native/libjava/io_util_md.c
! src/java.base/unix/native/libnio/ch/FileDispatcherImpl.c