Fix module_deps_cache_reuse.swift

Resolves rdar://78882565

Author: artemcm

test/ScanDependencies/module_deps_cache_reuse.swift

@@ -111,7 +111,7 @@ import SubE
 // CHECK-NEXT: "-frontend"
 // CHECK-NEXT: "-only-use-extra-clang-opts"
 // CHECK-NEXT: "-Xcc"
-// CHECK-NEXT: "clang"
+// CHECK-NEXT: "BUILD_DIR/bin/clang"
 // CHECK:      "-fsystem-module",
 // CHECK-NEXT: "-emit-pcm",
 // CHECK-NEXT: "-module-name",