[foreign-abi] RFR: 8247488: Add support for string helpers in CSupport

[Athijegannathan Sundararajan]

On Fri, 12 Jun 2020 15:09:55 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

> This is a relatively straightforward patch, which takes some of the code which jextract generates to help with string
> conversion to/from Java and puts it into the recently added CSupport class.

Marked as reviewed by sundar (Committer).

-------------

PR: https://git.openjdk.java.net/panama-foreign/pull/200