[8u][TESTBUG] RFR 8152098: Fix 8151522 caused test compiler/intrinsics/squaretolen/TestSquareToLen.java to fail

[Vladimir Kempik]

Hello

Please review this simple change for jdk8u.

Fixing TestSquareToLen testcase after 8151522 and same with 
MontgomeryMultiplyTest.


Bug: https://bugs.openjdk.java.net/browse/JDK-8152098
Webrev: http://cr.openjdk.java.net/~vkempik/8152098/webrev.00/

Thanks
-Vladimir