Added XInput dependency to pkgconfig file.

CMakeLists.txt

@@ -183,6 +183,7 @@ if (_GLFW_X11)
 
     list(APPEND glfw_INCLUDE_DIRS ${X11_Xinput_INCLUDE_PATH})
     list(APPEND glfw_LIBRARIES ${X11_Xinput_LIB})
+    set(GLFW_PKG_DEPS "${GLFW_PKG_DEPS} xi")
 
     # Check for Xf86VidMode (fallback gamma control)
     if (NOT X11_xf86vmode_FOUND)