build: do not consult the legacy location for libraries

Update the commands to use the CMake based output directory locations instead of
the legacy staging location.  This will allow us to stop copying the files for
compatibility.

Author: compnerd

utils/build-script-impl

@@ -3081,7 +3081,7 @@ for host in "${ALL_HOSTS[@]}"; do
                 fi
                 # If libdispatch is being built, TestFoundation will need access to it
                 if [[ ! "${SKIP_BUILD_LIBDISPATCH}" ]] ; then
-                    LIBDISPATCH_LIB_DIR=":$(build_directory ${host} libdispatch)/src/.libs"
+                    LIBDISPATCH_LIB_DIR=":$(build_directory ${host} libdispatch):$(build_directory ${host} libdispatch)/src"
                 else
                     LIBDISPATCH_LIB_DIR=""
                 fi