configure.in: AC_SUBST_FILE should have been AC_SUBST
configure.in: AC_SUBST_FILE should have been AC_SUBST

AC_SUBST_FILE happened to work in autoconf 2.59, but is broken in
autoconf 2.61.

techkey/nasm,projedi/nasm,projedi/nasm,letolabs/nasm,Distrotech/nasm,techkey/nasm,techkey/nasm,Distrotech/nasm,projedi/nasm,turingstudio/nasm,turingstudio/nasm,projedi/nasm,techkey/nasm,projedi/nasm,letolabs/nasm,turingstudio/nasm,Distrotech/nasm,letolabs/nasm,Distrotech/nasm,techkey/nasm,turingstudio/nasm