M38 gardening [Tizen] : Fix compilation error
M38 gardening [Tizen] : Don't use nacl

Currently, clang=0, but it seems that pnacl still use it. There will be
the following error:
out/Release/gen/sdk/linux_x86/pnacl_newlib/host_x86_32/bin/clang: error
while loading shared libraries: libLLVM-3.4svn.so: cannot open shared
object file: No such file or directory