DescriptionAvoid gmock warning "Uninteresting mock function call"
The call to MockSymbolSupplier::FreeSymbolData() was causing the following
gmock warning during unittests:
    GMOCK WARNING:
    Uninteresting mock function call - returning directly.
        Function call: FreeSymbolData(0x57600fd4)
This change fixes it by just allowing it to be called whenever.
BUG=chromium-os:20133
TEST=Ran unittests
  Patch Set 1 #
 MessagesTotal messages: 4 
  
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