RFR: JDK10: JDK-8180334: Unable to build jaotc launcher on windows

[Mandy Chung]

> On Jun 7, 2017, at 2:58 PM, Kumar Srinivasan <kumar.x.srinivasan at oracle.com> wrote:
> 
> Hello,
> 
> Please review the changes to fix  JDK-8180334,  essentially -DJAVA_ARGS exceeds
> a Visual Studio C++ compiler limit, and this fix provides a way to specify
> very long  string literals, by the build system.
> 
> This also includes some minor and subtle simplifications and cleanups wrt.
> the JAVA_ARGS and its handling.
> 
> Thanks
> 
> Webrev: http://cr.openjdk.java.net/~ksrini/8180334/webrev.00
> JBS: https://bugs.openjdk.java.net/browse/JDK-8180334

This is a reasonable short-term solution.  As we discussed, we should
look into extending jlink to create the native launcher using @argfile
in a future release.

make/launcher/LauncherCommon.gmk

+# EXTRA_JAVA_ARGS Processed into a -DEXTRA_JAVA_ARGS and is prependedi

typo: s/prependedi/prepended

src/java.base/share/native/launcher/main.c
  It may help to detect if main_jargc == 0 but extra_jargc > 0 and exit with an error in case any bug in creating such a launcher.

Mandy