[Sanitizer] Cleanup {ASAN, MSAN}_INTERCEPT_FUNC[_VER] macro

[yln]

Summary

Note that this change is not strictly NFC since we add the
(&(name) != &WRAP(name) part to the conditional for the _VER variant
of the macro.

lib/asan/asan_interceptors.h

 DECLARE_REAL(char*, strncpy, char *to, const char *from, uptr size)
 DECLARE_REAL(uptr, strnlen, const char *s, uptr maxlen)
 DECLARE_REAL(char*, strstr, const char *s1, const char *s2)
 
 #if !SANITIZER_MAC
 #define ASAN_INTERCEPT_FUNC(name)                                        \
   do {                                                                   \
     INTERCEPT_FUNCTION(name);                                            \
-    bool same = (& (name) == & WRAP(name));                              \
-    if ((!same || !REAL(name)))                                          \
+    if (&(name) != &WRAP(name) || !REAL(name))                           \
       VReport(1, "AddressSanitizer: failed to intercept '" #name "'\n"); \
   } while (0)
 #define ASAN_INTERCEPT_FUNC_VER(name, ver)                                     \
   do {                                                                         \
     INTERCEPT_FUNCTION_VER(name, ver);                                         \
-    name##_type ptr = (::__interception::real_##name);                         \
-    if ((!ptr || !REAL(name)))                                                 \
+    if (&(name) != &WRAP(name) || !REAL(name))                                 \
       VReport(                                                                 \
           1, "AddressSanitizer: failed to intercept '" #name "@@" #ver "'\n"); \
   } while (0)
 #else
 // OS X interceptors don't need to be initialized with INTERCEPT_FUNCTION.
 #define ASAN_INTERCEPT_FUNC(name)
 #endif  // SANITIZER_MAC
 
 #endif  // !SANITIZER_FUCHSIA
 
 #endif  // ASAN_INTERCEPTORS_H

lib/msan/msan_interceptors.cc

#define CHECK_UNPOISONED_CTX(ctx, x, n)                         \
   do {                                                          \
     if (!((MSanInterceptorContext *)ctx)->in_interceptor_scope) \
       CHECK_UNPOISONED_0(x, n);                                 \
   } while (0)
 
 #define MSAN_INTERCEPT_FUNC(name)                                       \
   do {                                                                  \
     INTERCEPT_FUNCTION(name);                                           \
-    bool same = (& (name) == & WRAP(name));                             \
-    if ((!same || !REAL(name)))                                         \
+    if (&(name) != &WRAP(name) || !REAL(name))                          \
       VReport(1, "MemorySanitizer: failed to intercept '" #name "'\n"); \
   } while (0)
 
 #define MSAN_INTERCEPT_FUNC_VER(name, ver)                                    \
   do {                                                                        \
     INTERCEPT_FUNCTION_VER(name, ver);                                        \
     name##_type ptr = (::__interception::real_##name);                        \
-    if ((!ptr || !REAL(name)))                                                \
+    if (&(name) != &WRAP(name) || !REAL(name))                                \
       VReport(                                                                \
           1, "MemorySanitizer: failed to intercept '" #name "@@" #ver "'\n"); \
   } while (0)
 
 #define COMMON_INTERCEPT_FUNCTION(name) MSAN_INTERCEPT_FUNC(name)
 #define COMMON_INTERCEPT_FUNCTION_VER(name, ver)                          \
   MSAN_INTERCEPT_FUNC_VER(name, ver)
 #define COMMON_INTERCEPTOR_UNPOISON_PARAM(count)  \