[Headers][X86] avx512cd - move constexpr to the end of the function attribute lists. NFC. (#166968)

Consistent with how we order the attributes in other headers

Makes it easier to compare constexpr/non-constexpr attribute defines

Author: RKSimon

clang/lib/Headers/avx512cdintrin.h

@@ -17,8 +17,8 @@
 /* Define the default attributes for the functions in this file. */
 #if defined(__cplusplus) && (__cplusplus >= 201103L)
 #define __DEFAULT_FN_ATTRS                                                     \
-  constexpr __attribute__((__always_inline__, __nodebug__,                     \
-                           __target__("avx512cd"), __min_vector_width__(512)))
+  __attribute__((__always_inline__, __nodebug__, __target__("avx512cd"),       \
+                 __min_vector_width__(512))) constexpr
 #else
 #define __DEFAULT_FN_ATTRS                                                     \
   __attribute__((__always_inline__, __nodebug__, __target__("avx512cd"),       \

clang/lib/Headers/avx512vlcdintrin.h

@@ -16,13 +16,13 @@
 /* Define the default attributes for the functions in this file. */
 #if defined(__cplusplus) && (__cplusplus >= 201103L)
 #define __DEFAULT_FN_ATTRS128                                                  \
-  constexpr __attribute__((__always_inline__, __nodebug__,                     \
-                           __target__("avx512vl,avx512cd"),                    \
-                           __min_vector_width__(128)))
+  __attribute__((__always_inline__, __nodebug__,                               \
+                 __target__("avx512vl,avx512cd"),                              \
+                 __min_vector_width__(128))) constexpr
 #define __DEFAULT_FN_ATTRS256                                                  \
-  constexpr __attribute__((__always_inline__, __nodebug__,                     \
-                           __target__("avx512vl,avx512cd"),                    \
-                           __min_vector_width__(256)))
+  __attribute__((__always_inline__, __nodebug__,                               \
+                 __target__("avx512vl,avx512cd"),                              \
+                 __min_vector_width__(256))) constexpr
 #else
 #define __DEFAULT_FN_ATTRS128                                                  \
   __attribute__((__always_inline__, __nodebug__,                               \