Bump up clang vesion accepting __builtin_isnan __attribute__((pcs("aapcs")))

Upstream clang3.6 still doesn't allow change of calling convension of
__builtin_isnan from the default to "softfp" (via __attribute__((pcs("aapcs"))))
as required by bionic libm.so for 32-bit ARM.  Let's hope clang3.7
fix that.  See upstream bug http://llvm.org/bugs/show_bug.cgi?id=20958

Change-Id: Ibdcc1783ffa7cf2f36e733983bd6d912ad38df70
5 files changed