Various tidy-up and fixes

[RichardH-code]

Summary .gdbinit: support remote debugging with gdb

Makefile: Provide minimal set of fonts for nano-X. Do not untar obsolete freetype source. (Was causing a conflict.) Avoid loading duplicate libraries (in both /lib and /mnt/.../lib). gdb target adds arm-linux-gdb to toolchain and builds gdbserver for remote debugging. Removed redundant and duplicate variable names.

applications/Makefile: Removed redundant and duplicate variable names.

applications/patchs/navit_opentom.patch: Removed last unnecessary patch to navit project file. (Created symlinks instead.)

navit/xslt/tomtom...xslt: Minor adjustments

applications/src/tools/Makefile: Build with debug symbols

configs/etc_rc_file.switch_root.minix: Start swap correctly

get_cross_env.sh: Remove directory with ARM binaries from path.

patchs/fltk-1.3.2_opentom_nxlib.patch: Resize fonts tool to fit screen.

patchs/microwin_git_opentom.patch: Allow debugging.

patchs/ppp-2.4.7_opentom.patch: Don't strip binary yet.

src/opentom_skel/bin/navit.sh: Use watchdog.

src/opentom_skel/etc/.shinit: Remove nonexistent directories from path.

src/tools/Makefile: Remove obsolete script file.

src/tools/install_shared_libs.sh: Avoid loading the same library twice.

src/tools/is_use_lib.sh: Removed.