hg: jdk9/hs-rt/hotspot: 7189721: nightly tests failed on JDI attaching

[dmitry.samersoff at oracle.com]

Changeset: e8c381b5f4e2
Author:    dsamersoff
Date:      2014-03-31 08:23 -0700
URL:       http://hg.openjdk.java.net/jdk9/hs-rt/hotspot/rev/e8c381b5f4e2

7189721: nightly tests failed on JDI attaching
Summary: If for some reason elf section with section names is not loaded to cache it attempts to read data using NULL section pointer.
Reviewed-by: sspitsyn, sla, kevinw

! agent/src/os/linux/symtab.c