package/dav1d: don't override TARGET_LDFLAGS

TARGET_LDFLAGS is overriden since the addition of the package in commit
8d66bc940d6e4707f9773aeb052e94d45fa439ad

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/dav1d/dav1d.mk

@@ -25,7 +25,7 @@ endif
 
 # Uses __atomic_fetch_add_4
 ifeq ($(BR2_TOOLCHAIN_HAS_LIBATOMIC),y)
-DAV1D_LDFLAGS += -latomic
+DAV1D_LDFLAGS += $(TARGET_LDFLAGS) -latomic
 endif
 
 $(eval $(meson-package))