Fix compiletest JSON error message

Author: ashtneoi

src/tools/compiletest/src/json.rs

@@ -82,7 +82,7 @@ pub fn extract_rendered(output: &str, proc_res: &ProcRes) -> String {
                     Err(error) => {
                         proc_res.fatal(Some(&format!(
                             "failed to decode compiler output as json: \
-                             `{}`\noutput: {}\nline: {}",
+                             `{}`\nline: {}\noutput: {}",
                             error, line, output
                         )));
                     }
@@ -114,7 +114,7 @@ fn parse_line(file_name: &str, line: &str, output: &str, proc_res: &ProcRes) ->
             Err(error) => {
                 proc_res.fatal(Some(&format!(
                     "failed to decode compiler output as json: \
-                     `{}`\noutput: {}\nline: {}",
+                     `{}`\nline: {}\noutput: {}",
                     error, line, output
                 )));
             }