Fix order in test

Author: David Ungar

Tests/SwiftDriverTests/SwiftDriverTests.swift

@@ -2133,14 +2133,14 @@ final class SwiftDriverTests: XCTestCase {
       "compile (swift-frontend)" -> "test.swiftmodule" [color=green];
       "test.swiftdoc" [fontsize=12];
       "compile (swift-frontend)" -> "test.swiftdoc" [color=green];
-      "mergeModule (swift-frontend)" [style=bold];
-      "test.swiftmodule" -> "mergeModule (swift-frontend)" [color=blue];
-      "mergeModule (swift-frontend)" -> "test.swiftmodule" [color=green];
-      "mergeModule (swift-frontend)" -> "test.swiftdoc" [color=green];
       "autolinkExtract (swift-autolink-extract)" [style=bold];
       "test.o" -> "autolinkExtract (swift-autolink-extract)" [color=blue];
       "test.autolink" [fontsize=12];
       "autolinkExtract (swift-autolink-extract)" -> "test.autolink" [color=green];
+      "mergeModule (swift-frontend)" [style=bold];
+      "test.swiftmodule" -> "mergeModule (swift-frontend)" [color=blue];
+      "mergeModule (swift-frontend)" -> "test.swiftmodule" [color=green];
+      "mergeModule (swift-frontend)" -> "test.swiftdoc" [color=green];
       "link (clang)" [style=bold];
       "test.o" -> "link (clang)" [color=blue];
       "test.autolink" -> "link (clang)" [color=blue];