65df957df6
No need to specify default behaviour. The original change introducing nasm:
7be093ea4d
mentions requiring 2.0.9, which was the first release to default to this behaviour:
http://www.nasm.us/doc/nasmdoc2.html
"The -Ox mode is recommended for most uses, and is the default since NASM 2.09."
Change-Id: Ia914c4deede5aa447277b5189bb4fcf7e54c338d