[Records] ECJ compiles arity mismatched canonical constructor

[srikanth-sankaran]

Found by JLS review and black-box testing:

This program compiles with ECJ but javac rejects it with: error: invalid canonical constructor in record R (type and arity must match that of the corresponding record component)

I believe javac behavior is correct since we won't be able to invoke the explicitly declared constructor with multiple int arguments.

record R(int ... x) {
	
	R(int [] x) {
		this.x = x;
	}
	
}