compilers/pirc: * add more pod doc to pirlexer.c to include specification.
compilers/pirc:
* add more pod doc to pirlexer.c to include specification.

git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@17720 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot