RewriteInstance: account .stab and .stabstr as debug sections

Summary:
.stab and .stabstr are special sections containing debugging
information and strings associated with the debugging information.
This commit adds them to the list of debugging sections, so
these sections can be removed for output binary.

Vasily Leonenko,
Advanced Software Technology Lab, Huawei

bolt/src/RewriteInstance.cpp

@@ -5425,7 +5425,8 @@ bool RewriteInstance::willOverwriteSection(StringRef SectionName) {
 }
 
 bool RewriteInstance::isDebugSection(StringRef SectionName) {
-  if (SectionName.startswith(".debug_") || SectionName == ".gdb_index")
+  if (SectionName.startswith(".debug_") || SectionName == ".gdb_index" ||
+      SectionName == ".stab" || SectionName == ".stabstr")
     return true;
 
   return false;