RFR(xxs): 8227035: JVM::printFlags fails in native OOM situations

[Thomas Stüfe]

Hi all,

JVM::printFlags crashed on me in a native OOM situation. That was
unnecessary.

small and simple fix:

issue: https://bugs.openjdk.java.net/browse/JDK-8227035
webrev:
http://cr.openjdk.java.net/~stuefe/webrevs/8227035-jvmflags-printflags-shall-not-allocate/webrev.00/webrev/

Thank you!

..Thomas