RFR(T/S) : 8224945 : googlemock update breaks the build of arm32

[Igor Ignatyev]

http://cr.openjdk.java.net/~iignatyev//8224945/webrev.00/index.html
> 10 lines changed: 10 ins; 0 del; 0 mod;


Hi all,

could you please review this small and trivial patch which undefines R, F1 and F2 macros in unittest.hpp so they won't conflict w/ typenames used in gmock?

testing: extensive build testing (which found JDK-8224949 -- an unrelated breakage on linux-x86)
webrev: http://cr.openjdk.java.net/~iignatyev//8224945/webrev.00/index.html 
JBS: https://bugs.openjdk.java.net/browse/JDK-8224945

Thanks,
-- Igor