add sndio support

comment is wrong, copypasted from elsewhere - we want to version the lib :)

Index: external/linphone-sdk/mediastreamer2/src/CMakeLists.txt
--- external/linphone-sdk/mediastreamer2/src/CMakeLists.txt.orig
+++ external/linphone-sdk/mediastreamer2/src/CMakeLists.txt
@@ -197,6 +197,9 @@ endif()
 if(ENABLE_PULSEAUDIO)
 	list(APPEND VOIP_SOURCE_FILES_C audiofilters/pulseaudio.c)
 endif()
+if(ENABLE_SNDIO)
+	list(APPEND VOIP_SOURCE_FILES_C audiofilters/sndio.c)
+endif()
 if(ENABLE_QSA)
 	list(APPEND VOIP_SOURCE_FILES_C audiofilters/qsa.c)
 endif()
@@ -662,8 +665,8 @@ if(BUILD_SHARED_LIBS)
 			target_link_options(mediastreamer2 PRIVATE "-Wl,--exclude-libs,libvpx.a")
 		endif()
 		# Do not version shared library on Android
-		set_target_properties(mediastreamer2 PROPERTIES SOVERSION ${MEDIASTREAMER_SO_VERSION})
 	else()
+		set_target_properties(mediastreamer2 PROPERTIES SOVERSION ${MEDIASTREAMER_SO_VERSION})
 
 
 		#Workaround for the Debian 11 issue with conflict between libc and libtirpc
