LU-12019 build: Recognize Debian Kernel and set KMP dir

LU-12019 build: Recognize Debian Kernel and set KMP dir

Recognize Debian kernel and make sure kernel module package (KMP)
directory matches with KMP_MODDIR of Ubuntu and the Debian building
package system.

Test-Parameters: clientdistro=ubuntu1804
Signed-off-by: Thomas Stibor <t.stibor@gsi.de>
Change-Id: Iaf3635af6a624c9395db3f891d31413cb9e57b92
Reviewed-on: https://review.whamcloud.com/34329
Tested-by: Jenkins
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Nathaniel Clark <nclark@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>