kpatch-build: detect core dump
Merge pull request #273 from jpoimboe/detect-core-dump

kpatch-build: detect core dump
test: remove annoying printks

The printks in the integration tests aren't very useful and annoyingly
fill up the dmesg buffer.  Remove them by making them contingent on
unlikely conditions.
test: detect kernel oopses and warnings
Merge pull request #274 from jpoimboe/remove-test-printks

test: remove annoying printks
Merge pull request #275 from jpoimboe/detect-printk-error

test: detect kernel oopses and warnings