osx: new script to attach debugger to running fontforge
Merge pull request #1967 from monkeyiq/osx-ff-add-debug-attach-script

osx: new script to attach debugger to running fontforge
osx: debug yeah, update the makefile too.
Merge pull request #1968 from monkeyiq/osx-ff-add-debug-attach-script2

osx: debug yeah, update the makefile too.