rpm: Slightly change the way python-rpm is constructed

rpm: Slightly change the way python-rpm is constructed

If python support is enabled we want to make sure that the RPM python support
is packaged properly.

Move the components into the site-packages directory, move the .la files to a
new -dev package.

Add "rpm" as a dependency of python-rpm, otherwise rpm and the associated
libraries won't be available.

Fixup python wrapper to handle automatic relocation, as supported by the
vendor WINDRIVER configuration.  (Based on a patch from Paul Eggleton)

(From OE-Core rev: cd0473a145cec51be736b6141b0b18a82b64d483)

Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>