Drop SEC_HAS_CONTENTS condition from section classification for NaCl layout

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

Committed: https://git.chromium.org/gitweb?p=native_client/nacl-binutils.git;a=commit;h=bf62813

[sehr, 2013-11-01 22:29:04]

lgtm

[Roland McGrath, 2013-11-01 22:42:50]

Committed patchset #1 manually as rbf62813 (presubmit successful).