Uncomment now-working vec! macro test.
Uncomment now-working vec! macro test.

aidancully/rust,rust-lang/miri,graydon/rust,graydon/rust,GBGamer/rust,aidancully/rust,graydon/rust,rust-lang/miri,GBGamer/rust,GBGamer/rust,rust-lang/miri,GBGamer/rust,rust-lang/miri,graydon/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,graydon/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,aidancully/rust,aidancully/rust,graydon/rust,tsion/miri