Always build bundled libb64 and libutp libraries as static (#4810)

cmake/TrMacros.cmake

@@ -140,6 +140,11 @@ macro(tr_add_external_auto_library ID DIRNAME LIBNAME)
     if(USE_SYSTEM_${ID})
         unset(${ID}_UPSTREAM_TARGET)
     elseif(_TAEAL_ARG_SUBPROJECT)
+        foreach(ARG IN LISTS _TAEAL_ARG_CMAKE_ARGS)
+            if(ARG MATCHES "^-D([^=: ]+)(:[^= ]+)?=(.*)$")
+                set(${CMAKE_MATCH_1} ${CMAKE_MATCH_3} CACHE INTERNAL "")
+            endif()
+        endforeach()
         add_subdirectory("${CMAKE_SOURCE_DIR}/third-party/${DIRNAME}" "${CMAKE_BINARY_DIR}/third-party/${DIRNAME}")
     else()
         set(${ID}_UPSTREAM_TARGET ${LIBNAME})