0.4.0

openkal-llvm-runtime 0.4.0 — repin on openkal-musl 0.7.0

No change to what this package builds. It follows openkal-musl to 0.7.0, which
follows openkal to 0.9.0.

One test changed, and it changed because a limitation was lifted.
examples/cxx asserted that creating a symbolic link is refused. openkal 0.9
added the operation, openkal-musl 0.7 answers symlinkat with it, and the
refusal stopped arriving — so the assertion failed, which is the good case. The
link is now created, read back, and asked about both ways: an enquiry that does
not resolve reports the link, one that resolves reports the file.

This repository's bare-metal row is where two defects one package away were
found: an optional openkal operation reached without the weak-reference seam
(a link failure on the only configuration that has no filesystem), and a C
library page size taken from a granularity of one.