Save Ballerina Binaries (#405)

diff --git a/commands/action.go b/commands/action.go
index 93da0a0..fb01c0b 100644
--- a/commands/action.go
+++ b/commands/action.go
@@ -662,6 +662,8 @@
 	switch strings.ToLower(runtime) {
 	case JAVA:
 		extension = JAVA_EXT
+	case BAL:
+		extension = BAL_BIN_EXT
 	default:
 		extension = ZIP_EXT
 	}