apk: define minimal variant for install

Choose the minimal release build which excludes a number of
unused applets, not used on user devices.

Signed-off-by: Paul Donald <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/21093
Signed-off-by: Christian Marangi <[email protected]>

package/system/apk/Makefile

@@ -70,7 +70,8 @@ MESON_HOST_ARGS += \
 
 MESON_ARGS += \
 	$(MESON_COMMON_ARGS) \
-	-Dcrypto_backend=$(BUILD_VARIANT)
+	-Dcrypto_backend=$(BUILD_VARIANT) \
+	-Dminimal=true
 
 define Package/apk/conffiles
 /etc/apk/repositories.d/customfeeds.list