8044534: Constant folding for unary + should produce int for boolean literals
Reviewed-by: lagergren, sundar
Error
at <anonymous> (test/script/basic/JDK-8030809.js:33)
at func (test/script/basic/JDK-8030809.js:32)
at <program> (test/script/basic/JDK-8030809.js:38)