cpusensor: detect if cpu is available

Add CPU inventory item detection via gpio.

Tested: inventory item is exposed

Change-Id: Ia26a4bed5534edec6a7f5c7cf0965f84fa0fc23a
Signed-off-by: James Feist <james.feist@linux.intel.com>
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1d57691..8279694 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -126,6 +126,7 @@
 add_executable (cpusensor src/CPUSensorMain.cpp ${CPU_SRC_FILES})
 add_dependencies (cpusensor sdbusplus-project)
 target_link_libraries (cpusensor ${SENSOR_LINK_LIBS})
+target_link_libraries (cpusensor gpiodcxx)
 
 add_executable (exitairtempsensor src/ExitAirTempSensor.cpp
                 ${EXIT_AIR_SRC_FILES})