Move compiler-builtins in mock-std to match the real one

Author: adamgemmell

…std/library/compiler_builtins/Cargo.toml …er-builtins/compiler-builtins/Cargo.tomltests/testsuite/mock-std/library/compiler_builtins/Cargo.toml renamed to tests/testsuite/mock-std/library/compiler-builtins/compiler-builtins/Cargo.toml tests/testsuite/mock-std/library/compiler_builtins/Cargo.toml renamed to tests/testsuite/mock-std/library/compiler-builtins/compiler-builtins/Cargo.toml

@@ -7,5 +7,5 @@ edition = "2018"
 [dependencies]
 std = { path = "../std" }
 panic_unwind = { path = "../panic_unwind" }
-compiler_builtins = { path = "../compiler_builtins" }
+compiler_builtins = { path = "../compiler-builtins/compiler-builtins" }
 registry-dep-using-std = { version = "*", features = ['mockbuild'] }