contrib: Allow wget to download URLs containing ;

For example, x264's git is one.
Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

contrib/src/main.mak

@@ -129,7 +129,7 @@ ifeq ($(shell curl --version >/dev/null 2>&1 || echo FAIL),)
 download = curl -f -L -- "$(1)" > "$@"
 else ifeq ($(shell wget --version >/dev/null 2>&1 || echo FAIL),)
 download = rm -f $@.tmp && \
-	wget --passive -c -p -O $@.tmp $(1) && \
+	wget --passive -c -p -O $@.tmp "$(1)" && \
 	touch $@.tmp && \
 	mv $@.tmp $@
 else