* commit '4e0cd081b09d9bd3d444062ca1081fa59c31fc0b':
Improved magic number garbage in cortexm3.c
Cleaned up debug output on linux build.
Removed #if LIGHT for unfinished hardware.
Implement gdb 'qCRC' packet to support 'compare-sections' command.
This doesn't work with vanilla gdb, as for reasons unknown said vanilla gdb doesn't support XML target descriptions queried from the remote.
Add code to the fault unwinder to deal with the stack alignment fixup and FP registers. Avoid saving/restoring registers that don't get trashed.