message: Fix Android remote debugging tests running on Windows
  Use make based OS check, instad of relying on shell.
diff: @@ -12,7 +12,10 @@ a.out: lib_a lib_b lib_c lib_d hidden_lib_d
  lib_%:
  $(MAKE) -f $*.mk
  - if [ "$(OS)" = "Darwin" -a -f libloadunload_d.dylib ]; then install_name_tool -id @executable_path/libloadunload_d.dylib libloadunload_d.dylib; fi
  +ifeq ($(OS),Darwin)
  + install_name_tool -id @executable_path/libloadunload_d.dylib libloadunload_d.dylib
  +endif
  +
  hidden_lib_d:
  $(MAKE) -C hidden
  