Add definition for DW_LANG_MIPS_Assembler. This file was originally

generated by a script.  I don't know if we're still regenerating
it or not; will have to check with Greg about how he's handling this
now.  Should update it for the final DWARF3 and soon-to-be-released
DWARF4 constants while I'm at it..

llvm-svn: 106045