[clang-tidy] Fix compilation for MSVS@PSP4 for ParentVirtualCallCheck.cpp

There's an error for PSP4 platform only: 
C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\INCLUDE\algorithm(95): 
error C2719: '_Pred': formal parameter with requested alignment of 8 won't be aligned

llvm-svn: 329495