Fix build on powerpc-unknown-freebsd

Probably also fixes build on mips*. Related to #104220

Author: pkubaj

Diff for: compiler/rustc_llvm/build.rs

@@ -237,18 +237,20 @@ fn main() {
 
     if !is_crossed {
         cmd.arg("--system-libs");
-    } else if target.contains("windows-gnu") {
-        println!("cargo:rustc-link-lib=shell32");
-        println!("cargo:rustc-link-lib=uuid");
-    } else if target.contains("netbsd") || target.contains("haiku") || target.contains("darwin") {
-        println!("cargo:rustc-link-lib=z");
-    } else if target.starts_with("arm")
+    }
+
+    if (target.starts_with("arm") && !target.contains("freebsd"))
         || target.starts_with("mips-")
         || target.starts_with("mipsel-")
         || target.starts_with("powerpc-")
     {
         // 32-bit targets need to link libatomic.
         println!("cargo:rustc-link-lib=atomic");
+    } else if target.contains("windows-gnu") {
+        println!("cargo:rustc-link-lib=shell32");
+        println!("cargo:rustc-link-lib=uuid");
+    } else if target.contains("netbsd") || target.contains("haiku") || target.contains("darwin") {
+        println!("cargo:rustc-link-lib=z");
     }
     cmd.args(&components);