zygote: drop braces on single item rule

commit 221938cb
introduces a fix that uses braces around a single item.
This is not within the normal style of no brace around
a single item. Drop the braces.

Change-Id: Ibeee1e682c0face97f18d5e5177be13834485676
Signed-off-by: William Roberts <william.c.roberts@intel.com>