Stop filtering package-info.java entries out of srcjars

MOE_MIGRATED_REVID=137733307
diff --git a/java/com/google/turbine/main/Main.java b/java/com/google/turbine/main/Main.java
index 296afb6..c6d9bd1 100644
--- a/java/com/google/turbine/main/Main.java
+++ b/java/com/google/turbine/main/Main.java
@@ -111,10 +111,6 @@
           if (!je.getName().endsWith(".java")) {
             continue;
           }
-          if (je.getName().equals("package-info.java")) {
-            // TODO(cushon): package-info.java files
-            continue;
-          }
           // overwrite existing entries for bug-compatibility with JavaBuilder (see b/26688023)
           String source = new String(ByteStreams.toByteArray(jf.getInputStream(je)), UTF_8);
           sources.put(je.getName(), new SourceFile(je.getName(), source));
diff --git a/javatests/com/google/turbine/main/MainTest.java b/javatests/com/google/turbine/main/MainTest.java
index 85597ae..bdb5243 100644
--- a/javatests/com/google/turbine/main/MainTest.java
+++ b/javatests/com/google/turbine/main/MainTest.java
@@ -90,6 +90,51 @@
     assertThat(fields).containsEntry("CONST", "TWO");
   }
 
+  @Test
+  public void packageInfo() throws IOException {
+    Path src = temporaryFolder.newFile("package-info.jar").toPath();
+    Files.write(src, "@Deprecated package test;".getBytes(UTF_8));
+
+    Path output = temporaryFolder.newFile("output.jar").toPath();
+
+    boolean ok =
+        Main.compile(
+            TurbineOptions.builder()
+                .addSources(ImmutableList.of(src.toString()))
+                .addBootClassPathEntries(BOOTCLASSPATH)
+                .setOutput(output.toString())
+                .setTempDir("")
+                .build());
+    assertThat(ok).isTrue();
+
+    Map<String, byte[]> data = readJar(output);
+    assertThat(data.keySet()).containsExactly("test/package-info.class");
+  }
+
+  @Test
+  public void packageInfoSrcjar() throws IOException {
+    Path srcjar = temporaryFolder.newFile("lib.srcjar").toPath();
+    try (JarOutputStream jos = new JarOutputStream(Files.newOutputStream(srcjar))) {
+      jos.putNextEntry(new JarEntry("package-info.java"));
+      jos.write("@Deprecated package test;".getBytes(UTF_8));
+    }
+
+    Path output = temporaryFolder.newFile("output.jar").toPath();
+
+    boolean ok =
+        Main.compile(
+            TurbineOptions.builder()
+                .setSourceJars(ImmutableList.of(srcjar.toString()))
+                .addBootClassPathEntries(BOOTCLASSPATH)
+                .setOutput(output.toString())
+                .setTempDir("")
+                .build());
+    assertThat(ok).isTrue();
+
+    Map<String, byte[]> data = readJar(output);
+    assertThat(data.keySet()).containsExactly("test/package-info.class");
+  }
+
   private Map<String, byte[]> readJar(Path output) throws IOException {
     Map<String, byte[]> data = new LinkedHashMap<>();
     try (JarFile jf = new JarFile(output.toFile())) {