Fix includes for opencv2

opencv-4.1.2-includes.patch

@@ -0,0 +1,24 @@
+diff -up opencv-4.1.2/cmake/templates/OpenCVConfig.cmake.in.orig opencv-4.1.2/cmake/templates/OpenCVConfig.cmake.in
+--- opencv-4.1.2/cmake/templates/OpenCVConfig.cmake.in.orig	2019-10-10 00:53:14.000000000 +0200
++++ opencv-4.1.2/cmake/templates/OpenCVConfig.cmake.in	2019-10-17 11:08:46.626400320 +0200
+@@ -106,7 +106,7 @@ set(OpenCV_SHARED @BUILD_SHARED_LIBS@)
+ set(OpenCV_USE_MANGLED_PATHS @OpenCV_USE_MANGLED_PATHS_CONFIGCMAKE@)
+ 
+ set(OpenCV_LIB_COMPONENTS @OPENCV_MODULES_CONFIGCMAKE@)
+-set(__OpenCV_INCLUDE_DIRS @OpenCV_INCLUDE_DIRS_CONFIGCMAKE@)
++set(__OpenCV_INCLUDE_DIRS @OpenCV_INCLUDE_DIRS_CONFIGCMAKE@ @OpenCV_INCLUDE_DIRS_CONFIGCMAKE@/opencv2)
+ 
+ set(OpenCV_INCLUDE_DIRS "")
+ foreach(d ${__OpenCV_INCLUDE_DIRS})
+diff -up opencv-4.1.2/cmake/templates/opencv-XXX.pc.in.orig opencv-4.1.2/cmake/templates/opencv-XXX.pc.in
+--- opencv-4.1.2/cmake/templates/opencv-XXX.pc.in.orig	2019-10-10 00:53:14.000000000 +0200
++++ opencv-4.1.2/cmake/templates/opencv-XXX.pc.in	2019-10-17 11:04:11.486014573 +0200
+@@ -3,7 +3,7 @@
+ prefix=@prefix@
+ exec_prefix=@exec_prefix@
+ libdir=@libdir@
+-includedir_old=@includedir@/opencv
++includedir_old=@includedir@/opencv2
+ includedir_new=@includedir@
+ 
+ Name: OpenCV

opencv.spec

@@ -75,6 +75,7 @@ Source1:        %{name}_contrib-clean-%{version}.tar.gz
 Source3:        face_landmark_model.dat.xz
 
 Patch0:         opencv-4.1.0-install_3rdparty_licenses.patch
+Patch1:         opencv-4.1.2-includes.patch
 
 BuildRequires:  gcc-c++
 BuildRequires:  libtool
@@ -247,6 +248,7 @@ mkdir 3rdparty/
 mv quirc/ 3rdparty/
 
 %patch0 -p1 -b .install_3rdparty_licenses
+%patch1 -p1 -b .inc2
 
 pushd %{name}_contrib-%{version}
 popd