Remove autotools cruft where make distclean failed.

# The actual Makefiles produced

Makefile

Makefile.in

# The local aclocal.m4 file

aclocal.m4

# The output of the configure script

config.guess

config.log

config.status

config.sub

# The configure script itself

configure

# The include directory artifacts

include/config.h

include/stamp-h1

# Various scripts used for libtool and the like

install-sh

libtool

ltmain.sh

missing

depcomp

# Not sure what this one is for

autom4te.cache/*