The variable in the case argument was mistyped, so the case always
checked against an empty string and never matched.
Fix the variable name. Add a PKG_RELEASE to Makefile so we can bump it.
Fixes: d6de31310c ("cmake: restore parallel build support for bootstrap")
Signed-off-by: Piotr Stefaniak <pstef@freebsd.org>
[add commit message, add PKG_RELEASE, fix commit title, add Fixes:]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>
(cherry picked from commit e27fbae63c3436ce5588ca06b78ea88c7a316fee)