message: Add CMakeLists.txt to distribution tarball
  Fixes
diff: ACLOCAL_AMFLAGS = --install -I builds/autoconf/m4
  EXTRA_DIST = AUTHORS.md README.md generator \
  - builds/cmake builds/Doxyfile
  + CMakeLists.txt builds/cmake builds/Doxyfile
  pkgconfigdir = ${libdir}/pkgconfig
  pkgconfig_DATA = builds/liblcf.pc
  