dpkg, opkg, rpm-postinsts: avoid repackaging when changing IMAGE_FEATURES

dpkg, opkg, rpm-postinsts: avoid repackaging when changing IMAGE_FEATURES

Recipes cannot depend on the value of IMAGE_FEATURES; in this case the
result is do_package task signatures changing every time IMAGE_FEATURES
changes, causing a large number of task re-executions. The
implementation of the log capturing really needs to be changed to
capture these in a different place and possibly not even conditional
upon IMAGE_FEATURES at all, but this will be invasive at this point in
the development cycle. For now, remove the variable dependencies to fix
the immediate problem.

Fixes [YOCTO #4246].

(From OE-Core rev: b4fbe4095de447ef4e426128bafaf8a292fa63e1)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>