updated to autotool of TeXLive 2018

source/Makefile.in

source/aclocal.m4

source/auxdir/auxsub/Makefile.in

source/auxdir/auxsub/aclocal.m4

source/auxdir/auxsub/configure

source/configure

source/doc/Makefile.in

source/libs/Makefile.in

source/libs/aclocal.m4

source/libs/configure

source/libs/gmp/Makefile.in

source/libs/gmp/aclocal.m4

source/libs/gmp/configure

source/libs/gmp/include/Makefile.in

source/libs/gmp/native/Makefile.in

source/libs/gmp/native/aclocal.m4

source/libs/gmp/native/configure

source/libs/libpng/Makefile.in

source/libs/libpng/aclocal.m4

source/libs/libpng/configure