Drop section rewriting and format fixes.

Turning off section rewriting in fixup_ldso that's not required to
satisfy sel_ldr anymore.

Formatting fixes left over from:
https://codereview.chromium.org/21636003/

BUG=https://code.google.com/p/nativeclient/issues/detail?id=3607
TEST=trybots
R=mseaborn@chromium.org

Review URL: https://codereview.chromium.org/22527004
7 files changed