Allow to add irt symbols with nacl-irt command.

BUG= none
TEST= use nacl-irt irt.nexe command and set breakpoint to __libc_init_array.

Review URL: https://chromiumcodereview.appspot.com/10828011
diff --git a/gdb/nacl-manifest.c b/gdb/nacl-manifest.c
index 927a269..b5c6d5b 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 @@
 /* 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 @@
 {
   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);
     }
 }
 
diff --git a/gdb/nacl-manifest.h b/gdb/nacl-manifest.h
index 81a726a..1035314 100644
--- a/gdb/nacl-manifest.h
+++ b/gdb/nacl-manifest.h
@@ -23,9 +23,6 @@
 /* Real filename for Native Client program.  */
 const char *nacl_manifest_program (void);
 
-/* Real filename for Native Client IRT.  */
-const char *nacl_manifest_irt (void);
-
 /* Real filename for Native Client original_name.  */
 const char *nacl_manifest_find (char *original_name);