REGRESSION(r146089): It broke 20 sputnik tests on ARM traditional and Thumb2
https://bugs.webkit.org/show_bug.cgi?id=112676

Rubber-stamped by Filip Pizlo.

Add one more EABI_32BIT_DUMMY_ARG to make DFG JIT ARM EABI compatible
again after r146089 similar to https://bugs.webkit.org/show_bug.cgi?id=84449

* dfg/DFGSpeculativeJIT.h:
(JSC::DFG::SpeculativeJIT::callOperation):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@146309 268f45cc-cd09-0410-ab3c-d52691b4dbfc