Drop SEC_HAS_CONTENTS condition from section classification for NaCl layout

This check causes it to refuse an RODATA segment that contains nothing
but .note.gnu.build-id.  The check only ever served to identify a
segment of nothing but read-only SHT_NOBITS sections, which never
happens in practice and would break things in other ways if it did.

BUG= none
TEST= manual
R=sehr@chromium.org

Review URL: https://codereview.chromium.org/56023003
diff --git a/bfd/elf-nacl.c b/bfd/elf-nacl.c
index c8fd7aa..e0d6ea9 100644
--- a/bfd/elf-nacl.c
+++ b/bfd/elf-nacl.c
@@ -44,14 +44,13 @@
 }
 
 /* Determine if this segment is eligible to receive the file and program
-   headers.  It must be read-only, non-executable, and have contents.
+   headers.  It must be read-only and non-executable.
    Its first section must start far enough past the page boundary to
    allow space for the headers.  */
 static bfd_boolean
 segment_eligible_for_headers (struct elf_segment_map *seg,
 			      bfd_vma minpagesize, bfd_vma sizeof_headers)
 {
-  bfd_boolean any_contents = FALSE;
   unsigned int i;
   if (seg->count == 0 || seg->sections[0]->lma % minpagesize < sizeof_headers)
     return FALSE;
@@ -59,10 +58,8 @@
     {
       if ((seg->sections[i]->flags & (SEC_CODE|SEC_READONLY)) != SEC_READONLY)
 	return FALSE;
-      if (seg->sections[i]->flags & SEC_HAS_CONTENTS)
-	any_contents = TRUE;
     }
-  return any_contents;
+  return TRUE;
 }