[clang] Silence -Wlogical-op-parentheses in Clang.cpp (NFC)

llvm-project/clang/lib/Driver/ToolChains/Clang.cpp:2721:49:
error: '&&' within '||' [-Werror,-Wlogical-op-parentheses]
        !Option.empty() && !NegateFortranOption && !NegateLimitedOption)
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
llvm-project/clang/lib/Driver/ToolChains/Clang.cpp:2721:49:
note: place parentheses around the '&&' expression to silence this warning
        !Option.empty() && !NegateFortranOption && !NegateLimitedOption)
                                                ^
        (                                                              )
1 error generated.