[ELF] Speed up Symbol::computeBinding. NFC

When computeBinding is inlined into includeInDynsym and computeIsPreemptible,
the optimizer can remove the config->gnuUnique load.

Author: MaskRay

lld/ELF/Symbols.cpp

@@ -273,7 +273,7 @@ uint8_t Symbol::computeBinding() const {
   if ((visibility != STV_DEFAULT && visibility != STV_PROTECTED) ||
       (versionId == VER_NDX_LOCAL && !isLazy()))
     return STB_LOCAL;
-  if (!config->gnuUnique && binding == STB_GNU_UNIQUE)
+  if (binding == STB_GNU_UNIQUE && !config->gnuUnique)
     return STB_GLOBAL;
   return binding;
 }