On Nix-based hosts (NixOS and any system using a nix-managed glibc),
locale data is not at the FHS path that glibc was compiled with.
glibc is told where to find it via the LOCALE_ARCHIVE environment
variable, which points at the locale-archive built by nix.

If LOCALE_ARCHIVE is not in the BitBake passthrough list it gets
stripped from the environment that runs the build, glibc falls back
to the "C" locale, and any task that depends on a real locale being
available (UTF-8 handling in Python, sort, gettext-aware tools, etc.)
either warns loudly or fails.

Add it to the passthrough list so the user's LOCALE_ARCHIVE reaches
BitBake's task environment.

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
(cherry picked from commit 614e4bf)

Write BB_HASHSERVE_DB_DIR ?= "${SSTATE_DIR}" into a freshly-generated
local.conf so multiple builds sharing the same sstate cache also share
the hash equivalence database. Matches the recommendation OE-Core's
sanity.bbclass emits and the default that bitbake-setup writes into its
generated local.conf upstream.

The setup script preserves an existing local.conf untouched, so this
only takes effect for new build directories; users who already have a
local.conf can keep their own value.

(cherry picked from commit c77f327)