Fix complex.h for clang.

From the comment about __NDK_FPABI__ vs __NDK_FPABI_MATH__:

    NOTE: Disable for clang for now unless _NDK_MATH_NO_SOFTFP=1, because clang before 3.4 doesn't
          allow change of calling convension for builtin and produces error message reads:

            a.i:564:6: error: function declared 'aapcs' here was previously declared without calling convention
            int  sin(double d) __attribute__((pcs("aapcs")));
                ^
            a.i:564:6: note: previous declaration is here

This applies to current clang as well, not just pre-3.4. Mark these
math functions as math functions.

Change-Id: I001b31df540aa3f61eec049f89346cbf2f11f128
1 file changed