WineDbg: adding a GDB remote proxy (part I)

[Eric Pouech]

before being able to add the GDB remote proxy code to winedbg, we need
first to have some internal restructuration
basically, winedbg had two nested loops:
- the outter one was in charge of the Win32 debug events
- the inner one was in charge of the parsing of commands

in order to incorporate the gdb proxy, we need to swap those two loops.
this first patch takes care of that. the second one will actually add
the gdb proxy code

Alexandre, those two patches are not really independant... wine (in fact
winedbg) will not compile if only the first is applied... but I thought
it was easier to set it that way

A+