hd[1|2]/libcoolstream: Update headers for new libcoolstream functions

libcoolstream-mt.so version 3.2.0 required

  Functions:
    - updateOsdScreenInfo()
    - GetVideoSystem()
    - GetVideoSystemFormatName()
    - fbCopy()
    - fbFill()
    - cs_set_extra_debug()

lib/hardware/coolstream/hd1/libcoolstream/cs_api.h

@@ -47,6 +47,9 @@ enum CS_LOG_MODULE {
 void cs_api_init(void);
 void cs_api_exit(void);
 
+/* Dummy for compatibility with HD2 */
+#define cs_new_auto_videosystem();
+
 // Memory helpers
 void *cs_malloc_uncached(size_t size);
 void cs_free_uncached(void *ptr);