loader: don't remove loader structs from CreateInfo for ICD

pNext/sType extension structs  that are unknown to a component must
be ignored by those components (layers, loader, ICDs).  Loader was
stripping off the pNext structs it added to DeviceCreateInfo and
InstanceCreateInfo. Remove this stripping as the loader passes needed
info to layers and ICDs via this.

Change-Id: I49f169660474cffba276afac0c224e1b74eaa4bc
1 file changed