Rebuild gcc-plugins before building kernel module
Rebuild gcc-plugins before building kernel module

RHEL kernel sources come with a shared library, stackleak_plugin.so,
that we fail to link against because of missing symbols.  This change
triggers a rebuild of that library before we try to build the kernel
module.

angeloc/sysdig,angeloc/sysdig,angeloc/sysdig,angeloc/sysdig,angeloc/sysdig