123595: Added missing .idl extension to exclude from error messages.
#i123637# update nss libraries to 3.14.4

Patch by: Pedro Giffuni <pfg@apache.org>
#i123637# fix nss build for OSX<10.5 targets on newer OSX hosts

change the check from host OS version to the OSX deployment target
#i123637# nss-3.14 has fixed the assembler-problems that stopped clang
#i123637# updated the nss_linux.patch for nss-3.14.4
#i123637# remove the now unused nspr-4.8.4-clang.patch