move end of trace indication to separate 'flags' field of bx_ia_opcode. this saves a lot of code duplication and simplifies the decode tables. also on the way found missing SVM opcodes that missed 'end of trace' mark

git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@11829 6c8e4198-a580-4521-a02f-c9ae86df1db9