libinterp/corefcn/mk-mxarray-h.in.sh missing

[Thomas D. Dean]

After update, build fails.

> cd buils
> ../configure LDFLAGS=-L/usr/local/lib/OpenBlas/lib \
          --enable-threads=posix
...
checking that generated files are newer than configure... done
configure: creating ./config.status
config.status: creating Makefile
config.status: creating build-aux/check-subst-vars.sh
config.status: creating doc/doxyhtml/Doxyfile
config.status: creating libgnu/Makefile
config.status: creating liboctave/octave.pc
config.status: creating libinterp/octinterp.pc
config.status: creating oct-conf-post.h-tmp
config.status: creating libgui/mk-default-qt-settings.sh-tmp
config.status: creating liboctave/external/mk-f77-def.sh-tmp
config.status: creating liboctave/mk-version-h.sh-tmp
config.status: error: cannot find input file:
           `libinterp/corefcn/mk-mxarray-h.in.sh'

> ls -l ../libinterp/corefcn/mk-mxarray-h.in.sh
ls: cannot access '../libinterp/corefcn/mk-mxarray-h.in.sh': No such 
file or directory

Tom Dean