Build config file for ArchLinux using the clang compiler

build_configs/buildconfig_arch_clang

modules/base/src/CMakeLists.txt

modules/base/src/boost_filesystem_helper.cc

modules/base/src/boost_filesystem_helper.hh

modules/io/src/mol/entity_io_crd_handler.cc

modules/io/src/mol/pdb_writer.cc

modules/io/src/mol/sdf_writer.cc

modules/mol/alg/src/lddt.cc

tools/molck/main.cc