use wr-c++ instead of vx-cxx

[BaoshanPang]

We decide to use the name "wr-c++" for the compiler driver.

[BaoshanPang]

@alexcrichton

Thanks for approved and merged the code.
Can you help to label it so we can pick it up with "cargo update"?

Thanks,
Baoshan

[alexcrichton]

Sure thing, done!

[BaoshanPang]

@alexcrichton

Appreciate your quick response.
But I made a big mistake, I typed "wr-c++" to "wr=c++", I need to create a new PR to fix it.
I am very sorry to bother you again.

Thanks,
Baoshan

[BaoshanPang]

@alexcrichton

Actually the code in my branch is correct, but the commit "0187762" changed "wr-c++" to "wr=c++" for some reason.

Can you help to fix it?

Thanks,
Baoshan

[alexcrichton]

Oops my bad, I typo'd the merge there

[alexcrichton]

(published a fixed version)

[BaoshanPang]

Thanks!