Add testcase for log2(2^N) for full N range
Add testcase for log2(2^N) for full N range

svaarala/duktape,markand/duktape,harold-b/duktape,markand/duktape,markand/duktape,svaarala/duktape,markand/duktape,svaarala/duktape,svaarala/duktape,harold-b/duktape,markand/duktape,markand/duktape,harold-b/duktape,harold-b/duktape,harold-b/duktape,svaarala/duktape,harold-b/duktape,markand/duktape,harold-b/duktape,markand/duktape,svaarala/duktape,svaarala/duktape,markand/duktape,svaarala/duktape,harold-b/duktape,harold-b/duktape,markand/duktape,harold-b/duktape,svaarala/duktape