RFR 8144279 [TESTBUG] hotspot/runtime/jsig/Test8017498.sh should use native library build support

[Gerald Thornbrugh]

Hi Everyone,

I would like to have the following change reviewed:

Bug: https://bugs.openjdk.java.net/browse/JDK-8144279
Webrev: http://cr.openjdk.java.net/~gthornbr/8144279/webrev.00/ 
<http://cr.openjdk.java.net/%7Egthornbr/8144279/webrev.00/>

JPRT testing completed without errors and I verified that the test was run.


The changes consist of:

Replacing the existing Test8017498.sh script file with a java test 
source file Testjsig.java.

Adding the test directory to the "BUILD_HOTSPOT_JTREG_NATIVE_SRC" list 
for Linux builds
so the native libTestJNI.c source file would be compiled into a native 
library.

Renaming the existing TestJNI.c native source file to libTestJNI.c so 
the build process would
identify the file as a native library source file and build the library.

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

Thanks,

Jerry