sanity.bbclass: check required perl modules

sanity.bbclass: check required perl modules

Several required perl modules may missing on the host, for example the
Text::ParseWords, Thread::Queue and Data::Dumper are not installed by
default on recent Fedora releases (19 and 20 AFAIK). There would be wild
errors if they don't exist, so check them in sanity.bbclass.

And add perl to SANITY_REQUIRED_UTILITIES.

[YOCTO #5744]

Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>