[OE-core] musl patches

[Andreas Müller]

Hi,

I am not happy plastering patches around for musl. This gets even
worse when I see patches like this [1]: Just wipe away security checks
unconditionally - the developers did introduce this check not just for
fun I guess...

I have seen this already elsewhere so: musl maintainers please take
care not to modify code for glibc!

[1] https://github.com/openembedded/openembedded-core/blob/master/meta/recipes-core/systemd/systemd/0001-Use-getenv-when-secure-versions-are-not-available.patch

Andreas