support -no_indirect_stubs w/ -coarse_units

_From [bruen...@google.com](https://code.google.com/u/109494838902877177630/) on January 27, 2012 22:49:59_

this was PR 213262/8827

this is one reason -coarse_units is off by default

_Original issue: http://code.google.com/p/dynamorio/issues/detail?id=659_

Start by reviewing the original issue and the referenced PR 213262/8827 to recover the expected interaction between -no_indirect_stubs and -coarse_units. Identify the relevant implementation and validation points from that history; done means the two options are supported together and the reason for -coarse_units being disabled by default is addressed.

Written by the indexing model from the issue text.