Log message:
devel/aceunit: Drop skipping vendor bash

macOS has bash 3 builtin, and the tools platform used to accept that.
Recently, tools bash was redefined to be >=4, and no longer uses macOS
bash.

The hack to avoid vendor bash was almost certainly about macOS, as I
know of no other system with bash3, and I know of no other packge
failures from bash 4.  On macOS, nothing will change; just a different
reason not to use system baas.  On SmartOS, the package might use
builtin bash 4, vs pkgsrc bash 5, but there's no reason to think
that's a problem.

Log message:
devel/aceunit: Use c89, not c90.

C90 is a synomym (to humans) for C89, differing only in ISO-ness and
formatting.  Therefore force c89, not c90, on the belief that no
compiler will behave differently, and because c90 is about to removed
from our list of dialects.

(It's not clear why this is forced; aceunit appears to support newer
standards, but I'm leaving that be.)

Log message:
Add aceunit: Advanced C and Embedded Unit test framework

AceUnit is a comfortable unit test framework for C, in the best
tradition of xUnit frameworks (like JUnit). Its target audience are
developers using the C programming language to develop firmware,
drivers, operating systems, and other C programs, like command line
programs. It is tiny and thus suitable even for extremely
resource-constrained environments.