Link libraries on Windows.

Former-commit-id: ac063fb3bbf50ea8d11b2460127df44fab6dfab8

shared/cmake/libigl.cmake

@@ -328,6 +328,7 @@ if(LIBIGL_WITH_OPENGL)
     target_include_directories(nanogui PUBLIC
       "${NANOGUI_DIR}/include"
       "${NANOGUI_DIR}/ext/nanovg/src")
+    target_link_libraries(nanogui PUBLIC glew)
   endif()
 
   # GLFW module