decklink: fix linking with recent sdk

modules/access/Makefile.am

@@ -143,7 +143,7 @@ EXTRA_LTLIBRARIES += liblinsys_hdsdi_plugin.la liblinsys_sdi_plugin.la
 
 libdecklink_plugin_la_SOURCES = access/decklink.cpp access/sdi.c access/sdi.h
 libdecklink_plugin_la_CXXFLAGS = $(AM_CFLAGS) $(CPPFLAGS_decklink)
-libdecklink_plugin_la_LIBADD = $(LIBS_decklink) -ldl
+libdecklink_plugin_la_LIBADD = $(LIBS_decklink) $(LIBDL) -lpthread
 if HAVE_DECKLINK
 access_LTLIBRARIES += libdecklink_plugin.la
 endif

modules/video_output/Makefile.am

@@ -4,7 +4,7 @@ vout_LTLIBRARIES =
 if HAVE_DECKLINK
 libdecklinkoutput_plugin_la_SOURCES = video_output/decklink.cpp
 libdecklinkoutput_plugin_la_CXXFLAGS = $(AM_CFLAGS) $(CPPFLAGS_decklinkoutput)
-libdecklinkoutput_plugin_la_LIBADD = $(LIBS_decklink) $(LIBDL)
+libdecklinkoutput_plugin_la_LIBADD = $(LIBS_decklink) $(LIBDL) -lpthread
 vout_LTLIBRARIES += libdecklinkoutput_plugin.la
 endif