bug 801466 - remove some usage of prmem in intl/ and network/ r=jduell

intl/strres/src/nsStringBundle.cpp

intl/uconv/src/nsConverterInputStream.cpp

intl/uconv/src/nsConverterInputStream.h

netwerk/base/public/nsReadLine.h

netwerk/base/src/nsFileStreams.cpp

netwerk/base/src/nsFileStreams.h

netwerk/base/src/nsSerializationHelper.cpp

netwerk/base/src/nsSocketTransport2.cpp

netwerk/cache/nsCacheMetaData.cpp

netwerk/cache/nsCacheMetaData.h

netwerk/protocol/data/nsDataChannel.cpp