* src/pp/Makefile.am: Don't distribute C files.
	* src/boxed2sdf/Makefile.am: Don't distribute C files.
	* src/boxed2pp-table/Makefile.am: Don't distribute C files.
	* src/pack-boxedsdf/Makefile.am: Don't distribute C files.
	* src/boxedsdf-merge/Makefile.am: Don't distribute C files.
	* src/parser/Makefile.am: Don't distribute C files.
	* src/boxedsdf-update/Makefile.am: Don't distribute C files.