[vector] Additional tests for comparison ops to bring the coverage up

[Viswanathan, Sandhya]

Please find below a webrev with additional tests for comparison ops to bring the coverage up:
http://cr.openjdk.java.net/~sviswanathan/vectorIntrinsics/TestCoverage/part3/webrev.00/

Tests added are:
Masked compare with vector
Masked/unmasked compare with scalar (Smoke tests only)
Masked/unmasked compare with long (Smoke tests only)

Best Regards,
Sandhya