Let's hope that the various static archives that get built by the NSS
build machinery contain what an iOS app that needs NSS services
requires. I patch out the construction of any dylibs and executables
in nss. We don't use any dylibs on iOS anyway, and of course don't
need any NSS executables either.

Change-Id: Ic977c6e3d6c4e953202e78f8e08c4e61f6c9cb1b