debug/gdb: fix tic install path, tell ncurses where to find it

ncurses 5.9 wants tic to be either one of:
- $TIC_PATH
- /usr/bin/tic

Of course, se do not want the latter, for it can be incompatible if the
ncurses in the build system is too old (eg. RHEL 5.6, Debian Lenny...).
So, force TIC_PATH to the location of our own tic.

Also, install tic alongside the other build tools, not in a sub-dir
of the toolchain installation dir.

Signed-off-by: Willy Tarreau <w@1wt.eu>
[yann.morin.1998@anciens.enib.fr: install in builtools/bin, move TIC_PATH]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

 # x86 specific options

 ## select ARCH_SUPPORTS_32

 ## select ARCH_SUPPORTS_64

 ## select ARCH_DEFAULT_32

 ## select ARCH_USE_MMU

 ## select ARCH_SUPPORT_ARCH

 ## select ARCH_SUPPORT_CPU

 ## select ARCH_SUPPORT_TUNE

 ##

 ## help The x86 architecture, as defined by:

 ## help     32-bit (ia32) : http://www.intel.com/

 ## help     64-bit (amd64): http://www.amd.com/us-en/Processors/DevelopWithAMD/0,,30_2252_875_7044,00.html