adding new project external/toolchain-utils

BUG:31321592

default.xml

@@ -311,6 +311,7 @@
   <project path="external/tinyxml" name="platform/external/tinyxml" groups="pdk" />
   <project path="external/tinyxml2" name="platform/external/tinyxml2" groups="pdk" />
   <project path="external/tlsdate" name="platform/external/tlsdate" groups="pdk" />
+  <project path="external/toolchain-utils" name="platform/external/toolchain-utils" />
   <project path="external/toybox" name="platform/external/toybox" groups="pdk" />
   <project path="external/tpm2" name="platform/external/tpm2" groups="pdk" />
   <project path="external/tremolo" name="platform/external/tremolo" groups="pdk" />