Add validation for number of arguments of __builtin_memcpy_inline

__builtin_memcpy_inline doesn't use the usual builtin argument validation code,
so it crashed when receiving wrong number of argument. Add the missing validation
check.

Open issue: https://github.com/llvm/llvm-project/issues/52949

Reviewed By: gchatelet

Differential Revision: https://reviews.llvm.org/D121965

Committed by gchatelet on behalf of "Roy Jacobson <roi.jacobson1@gmail.com>"