Dump INFO CODE_ID containing Build ID in Linux dump_syms

src/common/linux/file_id.h

Index: src/common/linux/file_id.h
diff --git a/src/common/linux/file_id.h b/src/common/linux/file_id.h
index 80e5a8e9a158b9c2f10e7d7386368bd69f98f786..a1d2fd6ed6b1c1f853c8416aaf5fce613870b455 100644
--- a/src/common/linux/file_id.h
+++ b/src/common/linux/file_id.h
@@ -73,6 +73,10 @@ class FileID {
   static std::string ConvertIdentifierToUUIDString(
       const wasteful_vector<uint8_t>& identifier);
 
+  // Convert the entire |identifier| data to a hex string.
+  static std::string ConvertIdentifierToString(
+      const wasteful_vector<uint8_t>& identifier);
+
  private:
   // Storage for the path specified
   std::string path_;