Add CMakeLists.txt to distribution tarball
Fixes
MODIFY
Makefile.am
Makefile.am
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

Add CMakeLists.txt to distribution tarball
Fixes #297.