PACKAGES_DYNAMIC: use regexp not glob

* bitbake uses PACKAGES_DYNAMIC as regexp
  ^ could make matching faster (and it will be more clear that we're expecting regexp not glob)
  * made all those last '-' optional, use .* (or nothing)
* use += instead of = in most cases to keep ${PN}-locale from
  bitbake.conf:PACKAGES_DYNAMIC = "^${PN}-locale-.*"

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>