Address code review

Author: corona10

Lib/test/libregrtest/utils.py

@@ -344,6 +344,10 @@ def get_build_info():
         # PGO (--enable-optimizations)
         optimizations.append('PGO')
 
+    if support.check_bolt_optimized():
+        # BOLT (--enable-bolt)
+        optimizations.append('BOLT')
+
     if optimizations:
         build.append('+'.join(optimizations))