message: gltfpack: Fix CMake option type
  option() only works for booleans.
diff: @@ -16,7 +16,7 @@ project(meshoptimizer VERSION 0.16 LANGUAGES CXX)
  option(MESHOPT_BUILD_DEMO "Build demo" OFF)
  option(MESHOPT_BUILD_GLTFPACK "Build gltfpack" OFF)
  option(MESHOPT_BUILD_SHARED_LIBS "Build shared libraries" OFF)
  -option(MESHOPT_BASISU_PATH "Basis Universal source path" "")
  +set(MESHOPT_BASISU_PATH "" CACHE STRING "")
  set(SOURCES
  src/meshoptimizer.h
  