Add missing headers to Autotools.
Fixes
@@ -114,10 +114,14 @@ pkginclude_HEADERS = \
../../include/libtcod.h \
../../include/txtfield.h \
../../include/libtcod_int.h \
+ ../../include/libtcod_portability.h \
+ ../../include/libtcod_utility.h \
+ ../../include/libtcod_version.h \
../../include/wrappers.h \
../../include/list.h \
../../include/zip.h \
../../include/mersenne.h \
+ ../../include/external/pstdint.h \
../../include/bresenham.hpp \
../../include/mersenne.hpp \
../../include/bsp.hpp \
