RFR 9 8031708: Windows x86 build failure: JNU_ThrowOutOfMemoryError undefined

[Chris Hegarty]

A recent change, JDK-8029007 introduced JNU_ThrowOutOfMemoryError into MessageUtils. The Windows x86 build subsequently fails as follows: 

Warning (shows the root cause): 
c:/jprt/T/P1/113753.chhegar/s/jdk/src/share/native/sun/misc/MessageUtils.c(58) : warning C4013: 'JNU_ThrowOutOfMemoryError' undefined; assuming extern returning int 

Actual linkage failure: 
...
   Creating library c:/cygwin/home/chhegar/sbdata/repos/jdk9/dev/dev/build/windows-x86-normal-server-release/jdk/objs/libjava/java.lib and object c:/cygwin/home/chhegar/sbdata/repos/jdk9/dev/dev/build/windows-x86-normal-server-release/jdk/objs/libjava/java.exp 
MessageUtils.obj : error LNK2019: unresolved external symbol _JNU_ThrowOutOfMemoryError referenced in function _printToFile 
c:/cygwin/home/chhegar/sbdata/repos/jdk9/dev/dev/build/windows-x86-normal-server-release/jdk/bin/java.dll : fatal error LNK1120: 1 unresolved externals 
lib/CoreLibraries.gmk:185: recipe for target `/cygdrive/c/cygwin/home/chhegar/sbdata/repos/jdk9/dev/dev/build/windows-x86-normal-server-release/jdk/bin/java.dll' failed 
make[2]: *** [/cygdrive/c/cygwin/home/chhegar/sbdata/repos/jdk9/dev/dev/build/windows-x86-normal-server-release/jdk/bin/java.dll] Error 96 
BuildJdk.gmk:70: recipe for target `libs-only' failed 
make[1]: *** [libs-only] Error 2 
/cygdrive/c/cygwin/home/chhegar/sbdata/repos/jdk9/dev/dev//make/Main.gmk:115: recipe for target `jdk-only' failed 
make: *** [jdk-only] Error 2 

Trivial fix. Include the header that defines the function ( whose return type is void ):
diff --git a/src/share/native/sun/misc/MessageUtils.c b/src/share/native/sun/misc/MessageUtils.c
--- a/src/share/native/sun/misc/MessageUtils.c
+++ b/src/share/native/sun/misc/MessageUtils.c
@@ -25,6 +25,7 @@
 
 #include <stdlib.h>
 #include <jni.h>
+#include <jni_util.h>
 #include <jlong.h>
 #include <stdio.h>
 #include <jvm.h>

-Chris.