In order to drop old euclid version, we still need to bump euclid for
plane-split and gfx/*. However, it needs more update and is not related to
this bug, so let's do that in other place. Here, we bump euclid to
0.18.1, and update style/values/generics/transform.rs for it.

MozReview-Commit-ID: JfNAxkR8wgs

--HG--
rename : third_party/rust/euclid/.cargo-checksum.json => third_party/rust/euclid-0.17.3/.cargo-checksum.json
rename : third_party/rust/euclid/Cargo.toml => third_party/rust/euclid-0.17.3/Cargo.toml
rename : third_party/rust/euclid/src/homogen.rs => third_party/rust/euclid-0.17.3/src/homogen.rs
rename : third_party/rust/euclid/src/length.rs => third_party/rust/euclid-0.17.3/src/length.rs
rename : third_party/rust/euclid/src/lib.rs => third_party/rust/euclid-0.17.3/src/lib.rs
rename : third_party/rust/euclid/src/macros.rs => third_party/rust/euclid-0.17.3/src/macros.rs
rename : third_party/rust/euclid/src/point.rs => third_party/rust/euclid-0.17.3/src/point.rs
rename : third_party/rust/euclid/src/rect.rs => third_party/rust/euclid-0.17.3/src/rect.rs
rename : third_party/rust/euclid/src/rotation.rs => third_party/rust/euclid-0.17.3/src/rotation.rs
rename : third_party/rust/euclid/src/scale.rs => third_party/rust/euclid-0.17.3/src/scale.rs
rename : third_party/rust/euclid/src/side_offsets.rs => third_party/rust/euclid-0.17.3/src/side_offsets.rs
rename : third_party/rust/euclid/src/size.rs => third_party/rust/euclid-0.17.3/src/size.rs
rename : third_party/rust/euclid/src/transform2d.rs => third_party/rust/euclid-0.17.3/src/transform2d.rs
rename : third_party/rust/euclid/src/transform3d.rs => third_party/rust/euclid-0.17.3/src/transform3d.rs
rename : third_party/rust/euclid/src/trig.rs => third_party/rust/euclid-0.17.3/src/trig.rs
rename : third_party/rust/euclid/src/vector.rs => third_party/rust/euclid-0.17.3/src/vector.rs
extra : rebase_source : 0594429c74c7391f80b4e291cd7fe9cbddd72b33