Add missing space in GradleStyleMessagerRenderer.render()

In `GradleStyleMessagerRenderer.render` method, when there is `location` pointing to some file and coordinates `line:column = 0:0`, then a space between the location and the message was not printed.
#KT-61737 Fixed

compiler/cli/src/org/jetbrains/kotlin/cli/common/messages/GradleStyleMessagerRenderer.kt

@@ -26,6 +26,7 @@ class GradleStyleMessageRenderer : MessageRenderer {
                 if (line > 0 && column > 0) {
                     append(":$line:$column")
                 }
+                append(' ')
             }
 
             append(message)