<rdar://problem/13128331>

Fixed "target symbols add" to correctly extract all module specifications from a dSYM file that is supplied and match the symbol file to a current target module using the UUID values if they are available.

This fixes the case where you add a dSYM file (like "foo.dSYM") which is for a renamed executable (like "bar"). In our case it was "mach_kernel.dSYM" which didn't match "mach_kernel.sys".