RFR 8144278 [TESTBUG] hotspot/runtime/StackGuardPages/testme.sh should use native library build support

[Gerald Thornbrugh]

Hi Everyone,

Please review my changes to address JDK-8144278.

Bug: https://bugs.openjdk.java.net/browse/JDK-8144278

JDK Webrev: http://cr.openjdk.java.net/~gthornbr/8144278/jdk-webrev.00/ 
<http://cr.openjdk.java.net/%7Egthornbr/8144278/jdk-webrev.00/>

Hotspot Webrev: 
http://cr.openjdk.java.net/~gthornbr/8144278/hotspot-webrev.00/ 
<http://cr.openjdk.java.net/%7Egthornbr/8144278/hotspot-webrev.00/>


The fix makes changes to two areas.

The JDK changes where needed to add a path to the libjvm.so library when 
linking test executables.
These changes where provide by Erik Joelsson.

The Hotspot changes addressed the following issues:

The StackGuardPages test directory needed to be added to the list of 
native executable tests.

The libjvm.so and libpthread.so libraries needed to be added to the 
LDFLAGS definition for the
"invoke" test executable.

The StackGuardPages/testme.sh script needed to specify that 
DoOverflow.java must be complied,
specify the new location of the "invoke" test executable and remove all 
portions of the script that
compiled and linked DoOverflow.java and invoke.c.

The native test source file "invoke.c" needed to be renamed 
"exeinvoke.c" so the build system will
automatically build it.

The native test source file exeinvoke.c needed to be changed to compile 
without warnings, pass the
path of the DoOverflow.class file to the function which starts the JVM 
and keep the linux gcc compiler
optimizer from in-lining the do_overflow() function which caused it not 
to get called.

Please let me know if you have any questions or concerns.

Thanks,

Gerald