scintilla headless: reuse makefile from the original platform makefile

(integrated from komodo (trunk) change 82704 by toddw)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@13863 b87d16e7-d29f-4ee1-b5ec-817d645d335f
scimoz headless: implement Mac parts

(integrated from komodo (trunk) change 82705 by toddw)

git-svn-id: http://svn.openkomodo.com/repos/openkomodo/trunk@13864 b87d16e7-d29f-4ee1-b5ec-817d645d335f