fixing several imports to work via pkg-config

This patch fixes several imports to use pkg-config instead of certain
esoteric tests.

src/Makefile.am

@@ -1,5 +1,3 @@
-AM_CPPFLAGS = $(GLIB_CFLAGS)
-
 bin_PROGRAMS = mpd
 SUBDIRS = $(MP4FF_SUBDIR)
 
@@ -196,8 +194,17 @@ mpd_SOURCES = \
 
 
 mpd_CFLAGS = $(MPD_CFLAGS)
+mpd_CPPFLAGS = \
+	$(AO_CFLAGS) $(ALSA_CFLAGS) \
+	$(OGGVORBIS_CFLAGS) \
+	$(patsubst -I%/FLAC,-I%,$(FLAC_CFLAGS)) \
+	$(AUDIOFILE_CFLAGS) $(LIBMIKMOD_CFLAGS) \
+	$(GLIB_CFLAGS)
 mpd_LDADD = $(MPD_LIBS) $(MP4FF_LIB) \
-  $(GLIB_LIBS)
+	$(AO_LIBS) $(ALSA_LIBS) \
+	$(OGGVORBIS_LIBS) $(FLAC_LIBS) \
+	$(AUDIOFILE_LIBS) $(LIBMIKMOD_LIBS) \
+	$(GLIB_LIBS)
 
 DIST_SUBDIRS = mp4ff