contrib: live555: use armlinux config when building for arm

(cherry picked from commit 4135148b)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

contrib/src/live555/rules.mak

@@ -20,8 +20,12 @@ live555: $(LIVE555_FILE) .sum-live555
 
 LIVE_TARGET = $(error live555 target not defined!)
 ifdef HAVE_LINUX
+ifeq ($(ARCH),arm)
+LIVE_TARGET := armlinux
+else
 LIVE_TARGET := linux
 endif
+endif
 ifdef HAVE_WIN32
 LIVE_TARGET := mingw
 endif