Disable the building of a debug package for isolcpus-device-plugin. It
causes grief with regards to centos8. As seen below:
RPM build errors:
error: Empty %files file /builddir/build/BUILD/isolcpus-device-plugin-1.0/debugsourcefiles.list
line 23: second Summary
Empty %files file /builddir/build/BUILD/isolcpus-device-plugin-1.0/debugsourcefiles.list
Child return code was: 1
Story: 2006796
Task: 42945
Signed-off-by: Charles Short <charles.short@windriver.com>
Change-Id: Ia239704de1b08909f2ef84d4aadd1fe240bf1e75