Log Message:
java-jna: fix builds with openjdk11 and recent GCC versions

The most recent openjdk11 update resulted in a change to the jquery
version that affects PLIST population of this package. Separately, there
are upstream compiler flags that were causing compilation failures with
recent GCC versions, e.g., 9.3 on NetBSD 9.99.78. (Since different Java
11 packages in pkgsrc aren't aligned with each other release-wise, this
may cause breakage elsewhere, but this at least fixes recent NetBSD on
x86. There's an unrelated problem with this package building on SmartOS
which I'll deal with separately.)