[compiler-rt] Always use INTERCEPTOR()+ALIAS()+WRAP() to create interceptor alias

[melver]

Summary

Do not open code creation of an interceptor alias to another
interceptor. Instead, use INTERCEPTOR() + ALIAS() + WRAP.

compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc

if (dtv) {
     COMMON_INTERCEPTOR_INITIALIZE_RANGE((void *)dtv->beg, dtv->size);
   }
   return res;
 }
 #if SANITIZER_PPC
 // On PowerPC, we also need to intercept __tls_get_addr_opt, which has
 // mostly the same semantics as __tls_get_addr, but its presence enables
 // some optimizations in linker (which are safe to ignore here).
-extern "C" __attribute__((alias("__interceptor___tls_get_addr"),
-                          visibility("default")))
-void *__tls_get_addr_opt(void *arg);
+INTERCEPTOR(void *, __tls_get_addr_opt, void *arg) ALIAS(WRAP(__tls_get_addr));
 #endif
 #else // SANITIZER_S390
 // On s390, we have to intercept two functions here:
 // - __tls_get_addr_internal, which is a glibc-internal function that is like
 //   the usual __tls_get_addr, but returns a TP-relative offset instead of
 //   a proper pointer.  It is used by dlsym for TLS symbols.
 // - __tls_get_offset, which is like the above, but also takes a GOT-relative
 //   descriptor offset as an argument instead of a pointer.  GOT address