Stop the GOLD linker from complaining about relocations from .gnu.build.attributes sections to discarded code sections.

* target-reloc.h (Default_comdat_behaviour:get): Ignore discarded
	relocs that refer to the .gnu.build.attributes section.

gold/ChangeLog

@@ -1,3 +1,8 @@
+2020-07-07  Nick Clifton  <nickc@redhat.com>
+
+	* target-reloc.h: (Default_comdat_behaviour:get): Ignore discarded
+	relocs that refer to the .gnu.build.attributes section.
+
 2020-07-06  Nick Clifton  <nickc@redhat.com>
 
 	* po/fr.po: Updated French translation.

gold/target-reloc.h

@@ -136,6 +136,7 @@ class Default_comdat_behavior
     if (Layout::is_debug_info_section(name))
       return CB_PRETEND;
     if (strcmp(name, ".eh_frame") == 0
+	|| is_prefix_of (".gnu.build.attributes", name)
 	|| strcmp(name, ".gcc_except_table") == 0)
       return CB_IGNORE;
     return CB_ERROR;