Fix a use-after-freed error introduced by previous attempt to fix a Coverity scan result.

PR 23633
	* objcopy.c (add_specific_symbols): Do not free the buffer at the
	end of the function.

binutils/objcopy.c

@@ -1143,7 +1143,8 @@ add_specific_symbols (const char *filename, htab_t htab)
       line_count ++;
     }
 
-  free (buffer);
+  /* Do not free the buffer.  Parts of it will have been referenced
+     in the calls to add_specific_symbol.  */
 }
 
 /* See whether a symbol should be stripped or kept