Fix malformed TOC linker error on OS X

[historic_bruno]

On OS X, after performing a build and editing some source code, errors like the following occur:

ld: in ../../../binaries/system/libengine.a, malformed archive TOC entry for _MASK__PSRETURN_Scripting_SetupFailed, offset 164452311 is beyond end of file 14363576 for architecture x86_64

or equally disturbing:

ld: in ../../../binaries/system/libengine.a(!<arch> #1/20), archive member '!<arch> #1/20' with length 100644 is not mach-o or llvm bitcode for architecture x86_64

We've been working around this by performing make clean every time, but that's a slow and frustrating process. Apparently the problem is the library table of contents needs to be updated after a rebuild, and this isn't happening automatically with ld. A suggested fix is ​running ranlib after ar and before ld which I can confirm works (run ranlb on the affected library after you get the error, then make again and it works). I don't know about the other suggestion of using the -s option for ar, but that's worth testing too.