mbedtls: add static files in staging_dir

Signed-off-by: Domagoj Pintaric <[email protected]>
Signed-off-by: Luka Perkov <[email protected]>

package/libs/mbedtls/Makefile

@@ -59,6 +59,7 @@ define Build/InstallDev
 	$(CP) $(PKG_INSTALL_DIR)/usr/include/mbedtls $(1)/usr/include/
 	$(INSTALL_DIR) $(1)/usr/lib
 	$(CP) $(PKG_INSTALL_DIR)/usr/lib/lib*.so* $(1)/usr/lib/
+	$(CP) $(PKG_INSTALL_DIR)/usr/lib/lib*.a $(1)/usr/lib/
 endef
 
 define Package/libmbedtls/install