Fix incompleteHierarchyInJava test on Windows

Normalize path delimiters to '/' via CliBaseTest

compiler/testData/compileKotlinAgainstCustomBinaries/incompleteHierarchyInJava/output.txt

@@ -1,3 +1,5 @@
 ERROR: compiler/testData/compileKotlinAgainstCustomBinaries/incompleteHierarchyInJava/source.kt: (5, 22) Unresolved reference: foo
 ERROR: The following classes have incomplete hierarchies:
     test.Sub, unresolved: [Super]
+
+COMPILATION_ERROR

compiler/tests/org/jetbrains/kotlin/cli/CliBaseTest.java

@@ -67,7 +67,7 @@ public class CliBaseTest {
     }
 
     @NotNull
-    static String getNormalizedCompilerOutput(@NotNull String pureOutput, @NotNull ExitCode exitCode, @NotNull String testDataDir) {
+    public static String getNormalizedCompilerOutput(@NotNull String pureOutput, @NotNull ExitCode exitCode, @NotNull String testDataDir) {
         String normalizedOutputWithoutExitCode = pureOutput
                 .replace(new File(testDataDir).getAbsolutePath(), "$TESTDATA_DIR$")
                 .replace("expected ABI version is " + Integer.toString(JvmAbi.VERSION), "expected ABI version is $ABI_VERSION$")

compiler/tests/org/jetbrains/kotlin/jvm/compiler/CompileKotlinAgainstCustomBinariesTest.java

@@ -208,7 +208,8 @@ public class CompileKotlinAgainstCustomBinariesTest extends TestCaseWithTmpdir {
                 "-classpath", tmpdir.getPath(),
                 "-d", tmpdir.getPath()
         ));
+        String output = CliBaseTest.getNormalizedCompilerOutput(pair.first, pair.second, getTestDataDirectory().getPath());
 
-        JetTestUtils.assertEqualsToFile(new File(getTestDataDirectory(), "output.txt"), pair.first);
+        JetTestUtils.assertEqualsToFile(new File(getTestDataDirectory(), "output.txt"), output);
     }
 }