merge libXt 1.3.1.

merge libXfixes 6.0.1, libXft 2.3.8, libXi 1.8.1, libXpm 3.5.16,
libXt 1.3.0, and xtrans 1.5.0.

merge libXaw 1.0.14, libXres 1.2.1, and libXt 1.2.1.

merge libXt 1.2.0

appease clang -Wformat errors with MKDEBUG=yes

Fix unsigned vs. signed char warnings (needed for clang).

add missing ,

initial import of libXt-1.1.4

initial import of libXt-1.1.1. important changes include:
avoid some NULL derefs
snprintf cleanup
big-endian 64 bit fixes

initial import of libXt-1.0.9

initial import of libXt-1.0.6

initial import of libXt-1.0.5