message: Add cmake config to autotools-based installs
  Fixes an issue where an old cmake version (<3.10) will not compile
  Player, because the needed EXPAT::EXPAT target is not available.
diff: @@ -5,7 +5,10 @@ pkgconfigdir = ${libdir}/pkgconfig
  pkgconfig_DATA = builds/liblcf.pc
  cmakeconfigdir = $(libdir)/cmake/liblcf
  -cmakeconfig_DATA = builds/liblcf-config.cmake
  +cmakeconfig_DATA = \
  + builds/liblcf-config.cmake \
  + builds/cmake/Modules/FindEXPAT.cmake \
  + builds/cmake/Modules/FindICU.cmake
  lib_LTLIBRARIES = liblcf.la
  liblcf_la_CPPFLAGS = \
  