[8u60] Backport approval: 8043770: File leak in MemNotifyThread::start() in hotspot.src.os.linux.vm.os_linux.cpp

[David Holmes]

Please approve this simple backport to 8u60. The 9 changeset applied 
cleanly.

bug: https://bugs.openjdk.java.net/browse/JDK-8043770

9 changeset: http://hg.openjdk.java.net/jdk9/hs-rt/hotspot/rev/351115afe32b

Original review thread:

http://mail.openjdk.java.net/pipermail/hotspot-runtime-dev/2014-October/012886.html

Thanks,
David