package_rpm.bbclass: Add the runtime dependencies to the pre/post scriptlets

package_rpm.bbclass: Add the runtime dependencies to the pre/post scriptlets

When the scriptlets are processed in RPM, they have a different dependency
set then the core package.  OE has no way to specify dependencies for the
pre/post scriptlists, so we simply make the runtime dependencies scriptlets
as well.

Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>