message: Makefile: remove printed line
diff: @@ -163,7 +163,7 @@ ifndef ANDROID_CMAKE_BIN
  $(error ANDROID_CMAKE_BIN is undefined, please point the \
  environment variable to cmake/3.6.3155560/bin/cmake from android-sdk.)
  else
  - # We need cmake from the Android SDK (currently at 3.6 because 3.7 fails the test).
  + @# We need cmake from the Android SDK (currently at 3.6 because 3.7 fails the test).
  $(eval CMAKE_BIN = $(ANDROID_CMAKE_BIN))
  endif
  