ident_test: declare precedence for 'else'

ident_test: declare precedence for 'else'

By declaring precedence for 'else', we suppress conflict warnings
Normally newlines and indents will resolve any conflict, but
if not, else associates to the right - it should be shifted, not cause
a reduce (which is the default anyway)

Signed-off-by: NeilBrown <neil@brown.name>