Fix a regex in javac.py.

build/android/gyp/javac.py

Index: build/android/gyp/javac.py
diff --git a/build/android/gyp/javac.py b/build/android/gyp/javac.py
index 3cce16dfb5b24caa3c9e0172be8aee89e9c9fa32..6c91424710039d58c70f0f821670b0c9e01cfcfc 100755
--- a/build/android/gyp/javac.py
+++ b/build/android/gyp/javac.py
@@ -83,7 +83,7 @@ def _ExtractClassFiles(jar_path, dest_dir, java_files):
   def extract_predicate(path):
     if not path.endswith('.class'):
       return False
-    path_without_suffix = re.sub(r'(?:\$|\.)[^/]+class$', '', path)
+    path_without_suffix = re.sub(r'(?:\$|\.)[^/]*class$', '', path)
     partial_java_path = path_without_suffix + '.java'
     return not any(p.endswith(partial_java_path) for p in java_files)