Use no arguments, update Lox.jar location

‘cmakeBuild’ is calling ‘make’, not ‘cmake --build’, so try passing in the ‘all’
target.

Jenkinsfile

@@ -7,9 +7,9 @@ pipeline {
                 cmakeBuild installation: 'InSearchPath',
                     buildDir: 'build',
                     sourceDir: 'src',
-                    steps: [[args: '.']]
+                    steps: [[args: 'all']]
 
-                archiveArtifacts artifacts: 'Lox.jar',
+                archiveArtifacts artifacts: 'build/com/craftinginterpreters/lox/Lox.jar',
                     fingerprint: false,
                     onlyIfSuccessful: true
             }