oscam: fixed QA issue where binary was being stripped

http://lists.openembedded.org/pipermail/openembedded-core/2014-August/095778.html



WARNING: QA Issue: File '/usr/bin/oscam' from oscam was already stripped,
this
will prevent future debugging! [already-stripped]

Fix above warning by telling cmake to do Debug type build, which prevents
linking with '-s' flag that removed symbols before bitbake could put them
into dbg package.

Signed-off-by: S. Lockwood-Childs <sjl@vctlabs.com>
Signed-off-by: Tom <King&lt;ka6sox@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>