Supporting 32bit iOS, means a.o. adding several libraries to
the dependency list because macOSX does not install them by
default (e.g. zlib).
32bit is only used in old iPhones.
updated configure.ac
removed from solenv/gbuild/platform
bridges corrected
Change-Id: I415e744a9cb4acb3b5fbfca33c22940a1d56e390