Allow to add irt symbols with nacl-irt command.

gdb/nacl-manifest.c

Index: gdb/nacl-manifest.c
diff --git a/gdb/nacl-manifest.c b/gdb/nacl-manifest.c
index 927a2692c345a9dc25486737ec87469ac2b64b6f..b5c6d5b6ceda56fc6e28294b6415c07fec6dff6c 100644
--- a/gdb/nacl-manifest.c
+++ b/gdb/nacl-manifest.c
@@ -26,6 +26,7 @@
 #include "readline/readline.h"
 #include "solib.h"
 #include "symfile.h"
+#include "objfiles.h"
 
 #include <ctype.h>
 #include <stdio.h>
@@ -56,8 +57,6 @@ static char *nacl_program_filename_32 = NULL;
 /* runnable-ld.so or statically linked 64-bit program name.  */
 static char *nacl_program_filename_64 = NULL;
 
-static char *nacl_irt_filename = NULL;
-
 const char *
 nacl_manifest_find (char *original_name)
 {
@@ -342,10 +341,11 @@ nacl_irt_command (char *args, int from_tty)
 {
   if (args)
     {
-      xfree (nacl_irt_filename);
+      char *nacl_irt_filename;
       nacl_irt_filename = tilde_expand (args);
-
-      solib_add (NULL, from_tty, NULL, 1);
+      symbol_file_add (nacl_irt_filename, from_tty ? SYMFILE_VERBOSE : 0,
+		       NULL, OBJF_USERLOADED);
+      xfree (nacl_irt_filename);
     }
 }