Add a PT_NOTE section to mark build_id.

nacl/dyn-link/ldscripts/elf64_nacl.x.static

Index: nacl/dyn-link/ldscripts/elf64_nacl.x.static
diff --git a/nacl/dyn-link/ldscripts/elf64_nacl.x.static b/nacl/dyn-link/ldscripts/elf64_nacl.x.static
index e5840b7c2eac7acb34dcc5805911aca99544f9d6..368ed287ce8f6c6415a15411f06f4219c469bc61 100644
--- a/nacl/dyn-link/ldscripts/elf64_nacl.x.static
+++ b/nacl/dyn-link/ldscripts/elf64_nacl.x.static
@@ -13,10 +13,11 @@ SEARCH_DIR("=/usr/local/lib"); SEARCH_DIR("=/lib"); SEARCH_DIR("=/usr/lib");
 PHDRS
 {
   headers PT_PHDR FILEHDR PHDRS ;  /* put the headers in a non-loadable seg */
-  seg_code    PT_LOAD FLAGS(5) ;   /* read + execute */
-  seg_rodata  PT_LOAD FLAGS(4) ;   /* read */
-  seg_tls     PT_TLS  FLAGS(4) ;
-  seg_rwdata  PT_LOAD FLAGS(6) ;   /* read + write */
+  seg_code     PT_LOAD FLAGS(5) ;   /* read + execute */
+  seg_rodata   PT_LOAD FLAGS(4) ;   /* read */
+  seg_tls      PT_TLS  FLAGS(4) ;
+  seg_rwdata   PT_LOAD FLAGS(6) ;   /* read + write */
+  seg_build_id PT_NOTE FLAGS(4) ; 
 }
 SECTIONS
 {
@@ -50,8 +51,8 @@ SECTIONS
     PROVIDE_HIDDEN (__note_gnu_build_id_start = .);
     *(.note.gnu.build-id)
     PROVIDE_HIDDEN (__note_gnu_build_id_end = .);
-  } :seg_rodata
-  .hash           : { *(.hash) }
+  } :seg_rodata :seg_build_id
+  .hash           : { *(.hash) } :seg_rodata
   .gnu.hash       : { *(.gnu.hash) }
   .dynsym         : { *(.dynsym) }
   .dynstr         : { *(.dynstr) }