Skip currently-failing testModuleAliasingPrebuiltWithScanDeps.

This test does not fail with recent toolchain snapshots, but seems to fail when using older (shipping) toolchains.

Author: artemcm

Tests/SwiftDriverTests/ExplicitModuleBuildTests.swift

@@ -594,6 +594,8 @@ final class ExplicitModuleBuildTests: XCTestCase {
 
 
   func testModuleAliasingPrebuiltWithScanDeps() throws {
+    // rdar://88073675
+    throw XCTSkip("Skipping, known failure (rdar://88073675).")
     try withTemporaryDirectory { path in
       let sdkArgumentsForTesting = (try? Driver.sdkArgumentsForTesting()) ?? []
       let (stdLibPath, shimsPath, _, _) = try getDriverArtifactsForScanning()