Add AAC Audio descriptor 0x7c

Decode AAC Audio descriptor 0x7c and identify profile, level and type.

src/Makefile.am

@@ -59,6 +59,7 @@ pkginclude_HEADERS = dvbpsi.h psi.h descriptor.h demux.h \
                      descriptors/dr_69.h \
                      descriptors/dr_73.h \
                      descriptors/dr_76.h \
+                     descriptors/dr_7c.h \
 		     descriptors/dr_83.h \
 		     descriptors/dr_8a.h \
                      descriptors/dr.h
@@ -102,6 +103,7 @@ descriptors_src = descriptors/dr_02.c \
                   descriptors/dr_69.c \
                   descriptors/dr_73.c \
                   descriptors/dr_76.c \
+                  descriptors/dr_7c.c \
                   descriptors/dr_83.c \
 		  descriptors/dr_8a.c
 

src/descriptors/dr.h

@@ -69,6 +69,7 @@
 #include "dr_62.h"
 #include "dr_66.h"
 #include "dr_69.h"
+#include "dr_7c.h"
 #include "dr_73.h"
 #include "dr_76.h"
 #include "dr_83.h"