Add a PT_NOTE section to mark build_id.

nacl/dyn-link/ldscripts/elf_nacl.x.static

Index: nacl/dyn-link/ldscripts/elf_nacl.x.static
diff --git a/nacl/dyn-link/ldscripts/elf_nacl.x.static b/nacl/dyn-link/ldscripts/elf_nacl.x.static
index 41de87a587ed3a3278750eb9ed804db03eeda037..9952daa85564d6d2c53ec8cf477ad97375fcb882 100644
--- a/nacl/dyn-link/ldscripts/elf_nacl.x.static
+++ b/nacl/dyn-link/ldscripts/elf_nacl.x.static
@@ -18,6 +18,7 @@ PHDRS
   seg_rodata  PT_LOAD FLAGS(4) ;   /* read */
   seg_tls     PT_TLS  FLAGS(4) ;
   seg_rwdata  PT_LOAD FLAGS(6) ;   /* read + write */
+  seg_note    PT_NOTE FLAGS(4) ;
 }
 SECTIONS
 {
@@ -51,7 +52,8 @@ SECTIONS
     PROVIDE_HIDDEN (__note_gnu_build_id_start = .);
     *(.note.gnu.build-id)
     PROVIDE_HIDDEN (__note_gnu_build_id_end = .);
-  } :seg_rodata
+  } :seg_rodata :seg_note
+  .dummy : {} :seg_rodata
   .hash           : { *(.hash) }
   .gnu.hash       : { *(.gnu.hash) }
   .dynsym         : { *(.dynsym) }