Fixed:
If more than one files have the same QA issue, it only prints the last
one, others are overrided, for example:
messages["host-user-contaminated"] = "foo1"
messages["host-user-contaminated"] = "foo2"
Only foo2 will be printed.
Add package_qa_add_message() to hanlde messages, so that all of them
will be printed. The package_qa_add_message() is from RP.
Signed-off-by: Robert Yang <liezhi.yang@windriver.com> Signed-off-by: Ross Burton <ross.burton@intel.com>