[builtins] Avoid using long double in FreeBSD standalone environment

After 05a4212 a number of long double related declarations are
enabled in `int_types.h`, whenever the CPU architecture and platform
support it. However, this does not work with FreeBSD's standalone
environment, which disallows any use of floating point.

In add98b2 this was made conditional with `CRT_HAS_FLOATING_POINT`,
so use that macro to also determine whether `HAS_80_BIT_LONG_DOUBLE` can
be turned on.

Author: DimitryAndric

compiler-rt/lib/builtins/int_types.h

@@ -156,7 +156,9 @@ typedef struct {
 // still makes it 80 bits. Clang will match whatever compiler it is trying to
 // be compatible with. On 32-bit x86 Android, long double is 64 bits, while on
 // x86_64 Android, long double is 128 bits.
-#if (defined(__i386__) || defined(__x86_64__)) &&                              \
+#if !CRT_HAS_FLOATING_POINT
+#define HAS_80_BIT_LONG_DOUBLE 0
+#elif (defined(__i386__) || defined(__x86_64__)) &&                            \
     !(defined(_MSC_VER) || defined(__ANDROID__))
 #define HAS_80_BIT_LONG_DOUBLE 1
 #elif defined(__m68k__) || defined(__ia64__)