[8u] RFR: JDK-8171913: aarch32: fix overloaded fmod usage with gcc6

[Alex Kashchenko]

Hi,

Please review and sponsor a trivial patch that fixes compilation for GCC6:

  - issue: https://bugs.openjdk.java.net/browse/JDK-8171913
  - webrev: 
http://cr.openjdk.java.net/~akasko/aarch32/jdk8u/8171913/webrev.00/

This change (currently used in Fedora as RPM patch) was added before [1] 
but was overwritten with softfloat change [2].

[1] 
http://mail.openjdk.java.net/pipermail/aarch32-port-dev/2016-March/000157.html
[2] 
http://hg.openjdk.java.net/aarch32-port/jdk8u/hotspot/rev/4d49ebf4b433#l17.555

-- 
-Alex