Avoid 'duplicate package' warnings when depending on cbindgen via git

When specifying `cbindgen` as a dependency via git, several 'skipping duplicate
package' warnings pop up regarding some of the test crates.

The warning seems to be spurious given that the test packages aren't needed when
depending on `cbindgen` (see rust-lang/cargo#10752),
but while a fix is being considered for Cargo, this commit disambiguates the
duplicated package names by referring to their relative paths.

tests/rust/dep_v2/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "expand-dep"
+name = "dep-2"
 version = "0.1.0"
 authors = ["cbindgen"]
 edition = "2018"

tests/rust/dep_v2/dep/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "dep"
+name = "dep-2-dep"
 version = "0.1.0"
 authors = ["cbindgen"]
 edition = "2018"

tests/rust/expand_default_features/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "expand"
+name = "expand-default-features"
 version = "0.1.0"
 authors = ["cbindgen"]
 

tests/rust/expand_dep_v2/dep/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "dep"
+name = "expand-dep-2-dep"
 version = "0.1.0"
 authors = ["cbindgen"]
 edition = "2018"

tests/rust/expand_dep_v2/dep_v2/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "dep"
+name = "expand-dep-2-dep-2"
 version = "0.2.0"
 authors = ["cbindgen"]
 edition = "2018"

tests/rust/expand_features/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "expand"
+name = "expand-features"
 version = "0.1.0"
 authors = ["cbindgen"]
 

tests/rust/expand_no_default_features/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "expand"
+name = "expand-no-default-features"
 version = "0.1.0"
 authors = ["cbindgen"]
 

tests/rust/workspace/dep/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "dep"
+name = "workspace-dep"
 version = "0.1.0"
 authors = ["cbindgen"]