RFR (XS) 8219574: Minimal VM build failure after JDK-8219414

[Aleksey Shipilev]

Bug:
  https://bugs.openjdk.java.net/browse/JDK-8219574

Fix:

diff -r e94ed0236046 src/hotspot/os/linux/os_linux.cpp
--- a/src/hotspot/os/linux/os_linux.cpp Fri Feb 22 09:23:37 2019 +0100
+++ b/src/hotspot/os/linux/os_linux.cpp Fri Feb 22 10:51:11 2019 +0100
@@ -1357,11 +1357,11 @@
 // called from signal handler. Before adding something to os::abort(), make
 // sure it is async-safe and can handle partially initialized VM.
 void os::abort(bool dump_core, void* siginfo, const void* context) {
   os::shutdown();
   if (dump_core) {
-#ifndef ZERO
+#ifndef INCLUDE_CDS
     if (DumpPrivateMappingsInCore) {
       ClassLoader::close_jrt_image();
     }
 #endif
 #ifndef PRODUCT


JDK-8219414 incorrectly removed INCLUDE_CDS guard, while 
ClassLoader::close_jrt_image() is still
only defined under INCLUDE_CDS.

Testing: Linux x86_64 {server, minimal, zero} builds

Thanks,
-Aleksey

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