Add support for TBB/TBH instructions.
Precisize rules for selection of thumb instructions.
Add short-cut notation support for most simple Thumb2 instructions ( add r1,#4 instead of add r1,r1,#4 ).

git-svn-id: http://svn.freepascal.org/svn/fpc/branches/laksen@29343 3ad0048d-3df7-0310-abae-a5850022a9f2