procps: Split package into subpackages

procps: Split package into subpackages

Split procps package into various subpackages, one for
each applet. This allows the user to choose which applets
they want. This is similar to coreutils package.

All subpackages are defaulted to YES, to keep the current
behaviour, i.e., selecting procps package will select
all its subpackages.

Signed-off-by: Jonh Wendell <jonh.wendell@oiwifi.com.br>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
git-svn-id: svn://svn.openwrt.org/openwrt/packages@34481 3c298f89-4303-0410-b956-a3cf2f4a3e73