llvm3.3: append --enable-zlib to EXTRA_OECONF instead of overwriting

The options added to EXTRA_OECONF in llvm3.inc were being overwritten
with --enable-zlib in llvm3.3_3.3.bb.

Signed-off-by: Jonathan Liu <net147@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
licences: Add iozone3, SMAIL_GPL

*fix the fllowing warning
     |WARNING:debianutils: No generic license file exists for: SMAIL_GPL in any provider
     |WARNING:iozone3: No generic license file exists for: iozone3 in any provider

Signed-off-by: Chunrong Guo <B40290@freescale.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>