insane: Update the insane class to check for host contamination

insane: Update the insane class to check for host contamination

[BUGID #376]

Update to the insane class to detect the new gcc and binutils poison
messages located within the config.log.  (Continue to scan for the old
style message.)

Add a new compile and install log check to the package_qa that scans the
logs for the same types of messages "unsafe for cross-compilation".

Signed-off-by: Mark Hatle <mark.hatle@windriver.com>