fix an error while building native gdb via ct-ng

Build ERROR:

[ERROR]  ../ncurses/lib_gen.c:889:15: error: expected ')' before 'int'
[ERROR]  make[3]: *** [../objects/lib_gen.o] Error 1
[ERROR]  ../ncurses/lib_gen.c:889:15: error: expected ')' before 'int'
[ERROR]  make[3]: *** [../obj_g/lib_gen.o] Error 1
[ERROR]  make[2]: *** [all] Error 2

Fix Method:

step 1: modify MKlib_gen.sh

MKlib_gen.sh
440 $preprocessor $TMP 2>/dev/null \
441 | sed \
442         -e 's/  / /g' \
443         -e 's/^ //' \
444         -e 's/_Bool/NCURSES_BOOL/g' \
445 | $AWK -f $AW2 \
446 | sed -f $ED3 \
447 | sed \
448         -e 's/^.*T_CALLED.*returnCode( \([a-z].*) \));/ return \1;/' \
449         -e 's/^.*T_CALLED.*returnCode( \((wmove.*) \));/        return \1;/' \
450         -e 's/gen_//' \
451         -e 's/^[        ]*#/#/' \
452         -e '/#ident/d' \
453         -e '/#line/d' \
454         -e '/# [0-9]* .*/d' \
455 | sed -f $ED4
456 

Step 2: rebuild 

Step 3: modify lib_gen.c

lib_gen.c
888 NCURSES_BOOL
889 NCURSES_EXPORT() (mouse_trafo) (int * a1, int * a2,  NCURSES_BOOL  z)
890 {
891         T((T_CALLED("mouse_trafo(%p,%p,%#lx)"), (const void *)a1, (const void *)a2, (long)z)); returnBool(wmouse_trafo(stdscr,a1,a2,z));
892 }