Add test to verify BUILD- and cmake-files are in sync with src/Makefile.am
diff --git a/cmake/libprotobuf-lite.cmake b/cmake/libprotobuf-lite.cmake
index 39c39c1..6bf86a2 100644
--- a/cmake/libprotobuf-lite.cmake
+++ b/cmake/libprotobuf-lite.cmake
@@ -10,7 +10,7 @@
   ${protobuf_source_dir}/src/google/protobuf/io/io_win32.cc
   ${protobuf_source_dir}/src/google/protobuf/io/strtod.cc
   ${protobuf_source_dir}/src/google/protobuf/io/zero_copy_stream.cc
-   ${protobuf_source_dir}/src/google/protobuf/io/zero_copy_stream_impl.cc
+  ${protobuf_source_dir}/src/google/protobuf/io/zero_copy_stream_impl.cc
   ${protobuf_source_dir}/src/google/protobuf/io/zero_copy_stream_impl_lite.cc
   ${protobuf_source_dir}/src/google/protobuf/message_lite.cc
   ${protobuf_source_dir}/src/google/protobuf/parse_context.cc