[mapserver-commits] [mapserver/mapserver] 5be276: Fix Undefined symbols compile error on macOS.

[offroad-bis]

  Branch: refs/heads/backport-5845-to-branch-7-4
  Home:   https://github.com/mapserver/mapserver
  Commit: 5be27642a63b8ad238514244e7a58cf55bfed154
      https://github.com/mapserver/mapserver/commit/5be27642a63b8ad238514244e7a58cf55bfed154
  Author: offroad-bis <46467576+offroad-bis at users.noreply.github.com>
  Date:   2019-08-16 (Fri, 16 Aug 2019)

  Changed paths:
    M mapscript/phpng/CMakeLists.txt

  Log Message:
  -----------
  Fix Undefined symbols compile error on macOS.

Added block of code defining -undefined dynamic_lookup for a LINK_FLAG to fix Undefined symbols for architecture x86_64: error when compiling.  Code block was taken directly from the CMakeLists.txt file located in the mapscript/php directory.