fix visibility.h not being copied to install folder (#2220)

* fix visibility.h not being copied to install folder

* fix missing header

src/ngraph/CMakeLists.txt

@@ -260,7 +260,9 @@ install(TARGETS ngraph DESTINATION ${NGRAPH_INSTALL_LIB})  # libngraph.so
 install(DIRECTORY
     ${CMAKE_CURRENT_SOURCE_DIR}/
     DESTINATION "${NGRAPH_INSTALL_INCLUDE}/ngraph"
-    FILES_MATCHING PATTERN "*.hpp"
+    FILES_MATCHING
+        PATTERN "*.hpp"
+        PATTERN "*.h"
 )
 
 set(CPACK_GENERATOR "DEB")

src/ngraph/runtime/interpreter/int_backend.hpp

@@ -61,7 +61,6 @@
 #include "ngraph/runtime/aligned_buffer.hpp"
 #include "ngraph/runtime/backend.hpp"
 #include "ngraph/runtime/host_tensor.hpp"
-#include "ngraph/runtime/interpreter/int_visibility.h"
 #include "ngraph/runtime/interpreter/node_wrapper.hpp"
 #include "ngraph/runtime/reference/abs.hpp"
 #include "ngraph/runtime/reference/acos.hpp"