jmx-dev RFR 8240604: Rewrite sun/management/jmxremote/bootstrap/CustomLauncherTest.java test to make binaries from source file

[Alexander Scherbatiy]

Hello,

Could you review a small enhancement where the test CustomLauncherTest 
is updated to build binary launcher file from launcher.c file.
The file launcher.c is renamed to exelauncher.c to follow the name 
convention for executable test files building by jdk make system.

Bug: https://bugs.openjdk.java.net/browse/JDK-8240604
Webrev: http://cr.openjdk.java.net/~alexsch/8240604/webrev.00

The changes for obsolete binary files from 
sun/management/jmxremote/bootstrap/linux-* and solaris-* are not 
included into the webrev. They needs to be removed manually.

The test is passed on Ubuntu 18.04 x86-64, Solaris Sparc v9 11.2, and 
Solaris x64 11.4 systems.

The test is excluded from Windows and Mac Os X systems.

Thanks,
Alexander.