If the user has disabled kext loading with the
plugin.dynamic-loader.darwin-kernel.load-kexts setting, don't print
any messages about loading the kexts (which isn't being done) and
don't read the Mach-O headers out of memory (which can be slow and
they're not being used for anything at this point).



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@176064 91177308-0d34-0410-b5e6-96231b3b80d8