Add cmake config file

Big thanks for @madebr who made all work

tools/dumprwtree/CMakeLists.txt

@@ -0,0 +1,14 @@
+add_executable(dumprwtree
+        dumprwtree.cpp
+    )
+
+target_link_libraries(dumprwtree
+    PUBLIC
+        librw
+    )
+
+if(LIBRW_INSTALL)
+    install(TARGETS dumprwtree
+        RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
+        )
+endif()