codec: Add preliminary codecs definitions for HR/FR/EFR

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
diff --git a/src/Makefile.am b/src/Makefile.am
index a8fe29d..13b69bd 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -2,4 +2,5 @@
 AM_CFLAGS=-Wall
 
 bin_PROGRAMS = gapk
-gapk_SOURCES = main.c
+gapk_SOURCES =	main.c	\
+		codecs.c codec_pcm.c codec_hr.c codec_fr.c codec_efr.c