fix: make sNaN simply const rather than static constexpr

Signed-off-by: Krishna Pandey <[email protected]>

Author: krishna2803

libc/test/UnitTest/FPMatcher.h

@@ -177,7 +177,8 @@ template <typename T> struct FPTest : public ErrnoCheckingTest {
   static constexpr T neg_zero = FPBits::zero(Sign::NEG).get_val();
   static constexpr T aNaN = FPBits::quiet_nan(Sign::POS).get_val();
   static constexpr T neg_aNaN = FPBits::quiet_nan(Sign::NEG).get_val();
-  static constexpr T sNaN = FPBits::signaling_nan().get_val();
+  // TODO: make this static constexpr
+  const T sNaN = FPBits::signaling_nan().get_val();
   static constexpr T inf = FPBits::inf(Sign::POS).get_val();
   static constexpr T neg_inf = FPBits::inf(Sign::NEG).get_val();
   static constexpr T min_normal = FPBits::min_normal().get_val();