Move rust-analyzer to DUP_TOOLS

The rust-analyzer documentation includes the step `cargo install`
into `~/.cargo/bin` when building from source. Since this has a chance
of accidentally overriding the user's copy, move this to DUP_TOOLS.

src/lib.rs

@@ -27,7 +27,6 @@ pub static TOOLS: &[&str] = &[
     "rust-gdb",
     "rust-gdbgui",
     "rls",
-    "rust-analyzer",
     "cargo-clippy",
     "clippy-driver",
     "cargo-miri",
@@ -36,7 +35,7 @@ pub static TOOLS: &[&str] = &[
 // Tools which are commonly installed by Cargo as well as rustup. We take a bit
 // more care with these to ensure we don't overwrite the user's previous
 // installation.
-pub static DUP_TOOLS: &[&str] = &["rustfmt", "cargo-fmt"];
+pub static DUP_TOOLS: &[&str] = &["rust-analyzer", "rustfmt", "cargo-fmt"];
 
 // If the given name is one of the tools we proxy.
 pub fn is_proxyable_tools(tool: &str) -> Result<()> {