package/opencv4: fix build with protobuf 3.18.0

Fix the following build failure raised since bump of protobuf to version
3.18.0 in commit c28924920d6df13a61879e3b301f71dd5edf2880:

/home/giuliobenetti/autobuild/run/instance-0/output-1/build/opencv3-3.4.15/modules/dnn/src/caffe/caffe_io.cpp: In function 'bool cv::dnn::ReadProtoFromBinary(google::protobuf::io::ZeroCopyInputStream*, google::protobuf::Message*)':
/home/giuliobenetti/autobuild/run/instance-0/output-1/build/opencv3-3.4.15/modules/dnn/src/caffe/caffe_io.cpp:1114:67: error: no matching function for call to 'google::protobuf::io::CodedInputStream::SetTotalBytesLimit(const int&, int)'
 1114 |     coded_input.SetTotalBytesLimit(kProtoReadBytesLimit, 536870912);
      |                                                                   ^
In file included from /home/giuliobenetti/autobuild/run/instance-0/output-1/build/opencv3-3.4.15/modules/dnn/src/caffe/caffe_io.cpp:93:
/home/giuliobenetti/autobuild/run/instance-0/output-1/host/mipsel-buildroot-linux-gnu/sysroot/usr/include/google/protobuf/io/coded_stream.h:401:8: note: candidate: 'void google::protobuf::io::CodedInputStream::SetTotalBytesLimit(int)'
  401 |   void SetTotalBytesLimit(int total_bytes_limit);
      |        ^~~~~~~~~~~~~~~~~~
/home/giuliobenetti/autobuild/run/instance-0/output-1/host/mipsel-buildroot-linux-gnu/sysroot/usr/include/google/protobuf/io/coded_stream.h:401:8: note:   candidate expects 1 argument, 2 provided

Fixes:
 - http://autobuild.buildroot.org/results/2856060cb59250f4ef7ab75a848a3dc0be9b821b

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>

package/opencv4/0001-Use-the-one-argument-version-of-SetTotalBytesLimit.patch

@@ -0,0 +1,39 @@
+From 9cfa84313c5833d7295fcf57be93d5d2aaadfd88 Mon Sep 17 00:00:00 2001
+From: Vincent Rabaud <vrabaud@google.com>
+Date: Sat, 10 Jul 2021 00:21:52 +0200
+Subject: [PATCH] Use the one argument version of SetTotalBytesLimit.
+
+The two argument versions has been deprecated, cf
+https://developers.google.com/protocol-buffers/docs/reference/cpp/google.protobuf.io.coded_stream
+
+[Retrieved from:
+https://github.com/opencv/opencv/commit/9cfa84313c5833d7295fcf57be93d5d2aaadfd88]
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+---
+ modules/dnn/src/caffe/caffe_io.cpp | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/modules/dnn/src/caffe/caffe_io.cpp b/modules/dnn/src/caffe/caffe_io.cpp
+index 2fc4d84f4604..ebecf95eea3a 100644
+--- a/modules/dnn/src/caffe/caffe_io.cpp
++++ b/modules/dnn/src/caffe/caffe_io.cpp
+@@ -92,6 +92,7 @@
+ #ifdef HAVE_PROTOBUF
+ #include <google/protobuf/io/coded_stream.h>
+ #include <google/protobuf/io/zero_copy_stream_impl.h>
++#include <google/protobuf/stubs/common.h>
+ #include <google/protobuf/text_format.h>
+ 
+ #include <opencv2/core.hpp>
+@@ -1111,7 +1112,11 @@ static const int kProtoReadBytesLimit = INT_MAX;  // Max size of 2 GB minus 1 by
+ 
+ bool ReadProtoFromBinary(ZeroCopyInputStream* input, Message *proto) {
+     CodedInputStream coded_input(input);
++#if GOOGLE_PROTOBUF_VERSION >= 3006000
++    coded_input.SetTotalBytesLimit(kProtoReadBytesLimit);
++#else
+     coded_input.SetTotalBytesLimit(kProtoReadBytesLimit, 536870912);
++#endif
+ 
+     return proto->ParseFromCodedStream(&coded_input);
+ }