[foreign] foreign EA build 70 available!

[Maurizio Cimadamore]

Hi,
as promised we managed to squeeze another EA - the bits are available here:

https://jdk.java.net/panama/

Some of the improvements since last build:

* enhanced macro support, which now correctly supports strings and 
pointer constants (JDK-8219822)
* added options to have jextract generate a jmod file (JDK-8218150)
* added support for endianness (JDK-8220296, JDK-8218153)
* added operations for bulk-copying Java arrays into native arrays and 
back (JDK-8220677)
* fixed code generation issues causing spurious errors when using 
extracted classes in IDEs (JDK-8219442)

As well as many other misc fixes and improvements.

Thanks for all the feedback received so far - please keep it coming!

Cheers
Maurizio