PR10280 initial fix: force vermagic for guru-mode scripts

PR10280 initial fix: force vermagic for guru-mode scripts

Current version checking based on kernel ABI and build-ids is not
strict enough to prevent launching a stap module on a kernel version
it wasn't compiled for. This has the potential to crash a running
kernel, since ABI compatibility may not give a sufficient guarantee of
real compatibility.

Initial fix, should investigate what other scenarios should have
tighter checking.