ACPICA: Disassembler: Emit descriptions for ACPI predefined names

For each predefined name, emit a short description within
a comment.

https://www.acpica.org/bugzilla/show_bug.cgi?id=959



Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>