A bunch of fixes/improvements to the gdb build:
- allow native builds (both shared and static)
- fix enabling threads
- better handle the gdbserver case
- introduce the ncurses library to allow native builds
- re-order config options adequately

/trunk/scripts/build/debug/300-gdb.sh | 126 79 47 0 ++++++++++++++++++++++++++---------------
/trunk/config/debug/gdb.in | 45 33 12 0 +++++++++++----
2 files changed, 112 insertions(+), 59 deletions(-)

 # Compute IA-64-specific values

 CT_DoArchValues() {

     # The architecture part of the tuple:

     CT_TARGET_ARCH="${CT_ARCH}"

 }