Fixed issue when importing via XML

http://support.advancedcustomfields.com/discussion/5308/acf-version-4-issue-exporting-and-importing-fields-from-one-site-to-another-within-same-multisite
Signed-off-by: Elliot Condon <e@elliotcondon.com>
Adding === to location rules to avoid miss matches

Signed-off-by: Elliot Condon <e@elliotcondon.com>