dtoolbase: Apply pvector libc++ workaround across the board

The bug with empty vector_uchar causing a crash seems to occur on Android as well

dtool/src/dtoolbase/pvector.h

@@ -51,13 +51,9 @@ public:
   pvector(pvector<Type> &&from) noexcept : base_class(std::move(from)) {};
   explicit pvector(size_type n, TypeHandle type_handle = pvector_type_handle) : base_class(n, Type(), allocator(type_handle)) { }
   explicit pvector(size_type n, const Type &value, TypeHandle type_handle = pvector_type_handle) : base_class(n, value, allocator(type_handle)) { }
-#ifdef __APPLE__
   pvector(const Type *begin, const Type *end, TypeHandle type_handle = pvector_type_handle) : base_class(allocator(type_handle)) {
     this->insert(this->end(), begin, end);
   }
-#else
-  pvector(const Type *begin, const Type *end, TypeHandle type_handle = pvector_type_handle) : base_class(begin, end, allocator(type_handle)) { }
-#endif
   pvector(std::initializer_list<Type> init, TypeHandle type_handle = pvector_type_handle) : base_class(std::move(init), allocator(type_handle)) { }
 
   pvector<Type> &operator =(const pvector<Type> &copy) {