We had to squirrel away the dyld module before doing ResolveExecutableModule, since
that would clear the module list, and then put it back by hand.  But we forgot to 
also put its sections back in the target SectionList, so we would jettison it as
unloaded when we finished handling the first real load event.  Add its sections.

<rdar://problem/18385947>


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@218156 91177308-0d34-0410-b5e6-96231b3b80d8