insane.bbclass: add QA tests for unsafe references to exec_prefix
Files under exec_prefix (commonly /usr) may not be available during
system recovery. exec_prefix may also be kept on a separate partition
that is mounted late in the boot process.
This QA test throws an warning if a binary in base_[bindir|sbindir|libdir]
is dynamically linked to a file under exec_prefix. The intention is to
turn this into an error in the near future.
It also checks executable non-binaries (e.g, shell scripts) in the above
base directories with a simple grep test to look for references to
exec_prefix. This test only produces a warning, since false positives
are likely.
This fixes [YOCTO #1008]
Signed-off-by: Scott Garman <scott.a.garman@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
