core/legal-info: fix missing double-$

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Luca Ceresoli <luca@lucaceresoli.net>
Reviewed-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Tested-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/pkg-generic.mk

@@ -795,7 +795,7 @@ else
 
 ifeq ($$($(2)_REDISTRIBUTE),YES)
 ifneq ($$($(2)_ACTUAL_SOURCE_TARBALL),$$($(2)_SOURCE))
-	$(call DOWNLOAD,$$($(2)_ACTUAL_SOURCE_SITE)/$$($(2)_ACTUAL_SOURCE_TARBALL))
+	$$(call DOWNLOAD,$$($(2)_ACTUAL_SOURCE_SITE)/$$($(2)_ACTUAL_SOURCE_TARBALL))
 endif
 # Copy the source tarball (just hardlink if possible)
 	@cp -l $$(DL_DIR)/$$($(2)_ACTUAL_SOURCE_TARBALL) $$(REDIST_SOURCES_DIR_$$(call UPPERCASE,$(4))) 2>/dev/null || \