[vector] Miscellaneous tests to complete coverage of X-Vector.java

[Viswanathan, Sandhya]

Please find below a webrev which adds miscellaneous tests and attempts to increase the coverage of public methods in X-Vector.java to 100%:

http://cr.openjdk.java.net/~sviswanathan/vectorIntrinsics/TestCoverage/part6/webrev.00/

The smoke tests added are:
blend with long
eq
hashCode
lanewise with broadcast long for float/double
lt
test
toInt
toLong
toString

With this the test coverage of overall Vector API public methods should go up to ~97.5%.

Best Regards,
Sandhya