Move commonly used German tones (A/B/C-Netz) to separate lib.a

src/bnetz/Makefile.am

@@ -1,4 +1,3 @@
-AUTOMAKE_OPTIONS = subdir-objects
 AM_CPPFLAGS = -Wall -Wextra -g $(all_includes)
 
 bin_PROGRAMS = \
@@ -10,12 +9,11 @@ bnetz_SOURCES = \
 	dsp.c \
 	stations.c \
 	image.c \
-	$(top_builddir)/src/anetz/freiton.c \
-	$(top_builddir)/src/anetz/besetztton.c \
 	ansage.c \
 	main.c
 bnetz_LDADD = \
 	$(COMMON_LA) \
+	$(top_builddir)/src/common/libgermanton.a \
 	$(top_builddir)/src/common/libmobile.a \
 	$(top_builddir)/src/common/libcommon.a \
 	$(ALSA_LIBS) \