export define HELP_MENU_HEADER does not work on macOS

[Alexey Palazhchenko]

# help menu

export define HELP_MENU_HEADER
# Getting Started

To build this project, you must have the following installed:

Not sure why we use export define there, but it doesn't work on macOS with the default GNU Make 3.81:

$ make
Makefile:52: *** missing separator.  Stop.

Removing export helps.