zstd: remove lto and as-needed flags

The former can be implemented as a meson argument.

The latter is already default.

No compiled difference, therefore no PKG_RELEASE bump.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

utils/zstd/Makefile

@@ -74,10 +74,8 @@ MESON_ARGS += \
 	-Dbin_control=false \
 	-Dzlib=disabled \
 	-Dlzma=disabled \
-	-Dlz4=disabled
-
-TARGET_CFLAGS += -flto
-TARGET_LDFLAGS += -Wl,--as-needed
+	-Dlz4=disabled \
+	-Db_lto=true
 
 define Build/InstallDev
 	$(INSTALL_DIR) $(1)/usr/include