Automatically update macOS build version at build time.

docs/CHANGES.txt

@@ -61,6 +61,9 @@ http://www.tuxpaint.org/
       (also corrects some warnings being reported by libpng (via SDL_image);
       h/t Tim Dickson, closes https://sourceforge.net/p/tuxpaint/bugs/252/)
 
+    * Automatically update macOS build version from the command line at build
+      time.
+
   * Ports & Building:
     -----------------
     * Change name of Tux Paint config. files from ".conf" to ".cfg"

docs/RELEASE.txt

@@ -25,7 +25,6 @@ a .tar.gz source tarball, and making the tarball available for download.
 
    * Build description files:
      * tuxpaint.spec (Linux RPM package)
-     * macos/Info.plist (macOS build)
      * win32/resources.rc (Windows mingw/msys build)
 
    * Changelog