Fix Include Directory in CMakeLists

See OpenDDS/opendds-monitor#16 (comment) for details

CMakeLists.txt

@@ -73,13 +73,13 @@ set(OPENDDS_TARGETS
 )
 
 target_include_directories(${PROJECT_NAME} PUBLIC
-	$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
-	$<INSTALL_INTERFACE:include>
+  $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>
+  $<INSTALL_INTERFACE:include>
 )
 
 set_property(TARGET ${PROJECT_NAME}
-	APPEND PROPERTY PUBLIC_HEADER
-	${MANAGER_HEADER}
+  APPEND PROPERTY PUBLIC_HEADER
+  ${MANAGER_HEADER}
 )
 
 target_link_libraries(OpenDDW
@@ -92,23 +92,23 @@ OPENDDS_TARGET_SOURCES(OpenDDW idl/std_qos.idl)
 INCLUDE(CMakePackageConfigHelpers)
 
 install(TARGETS ${PROJECT_NAME}
-	EXPORT ${PROJECT_NAME}
+  EXPORT ${PROJECT_NAME}
 
-	RUNTIME DESTINATION bin
-	LIBRARY DESTINATION lib
-	ARCHIVE DESTINATION lib
-	PUBLIC_HEADER DESTINATION include
+  RUNTIME DESTINATION bin
+  LIBRARY DESTINATION lib
+  ARCHIVE DESTINATION lib
+  PUBLIC_HEADER DESTINATION include
 )
 
 INSTALL(EXPORT ${PROJECT_NAME}
-	NAMESPACE ${PROJECT_TARGET_PREFIX}::
-	FILE ${PROJECT_TARGET_FILE}
-	DESTINATION ${CONFIG_FILE_INSTALL_LOCATION}
+  NAMESPACE ${PROJECT_TARGET_PREFIX}::
+  FILE ${PROJECT_TARGET_FILE}
+  DESTINATION ${CONFIG_FILE_INSTALL_LOCATION}
 )
 
 INSTALL(FILES
-	idl/std_qos.idl
-	DESTINATION idl
+  idl/std_qos.idl
+  DESTINATION idl
 )
 
 CONFIGURE_PACKAGE_CONFIG_FILE(${PROJECT_PACKAGE_CONFIG_IN_FILE}