CMake: the Primitives library needs MeshTools to be built.

Went undiscovered until now, when a magnum-extras Android build enabled
Primitives but not MeshTools and then later failed as FindMagnum linked
optional Primitives to (required) MeshTools but those weren't found.

CMakeLists.txt

@@ -217,7 +217,8 @@ cmake_dependent_option(MAGNUM_WITH_TGAIMPORTER "Build TgaImporter plugin" OFF "N
 cmake_dependent_option(MAGNUM_WITH_AUDIO "Build Audio library" OFF "NOT MAGNUM_WITH_AL_INFO;NOT MAGNUM_WITH_ANYAUDIOIMPORTER;NOT MAGNUM_WITH_WAVAUDIOIMPORTER" ON)
 option(MAGNUM_WITH_DEBUGTOOLS "Build DebugTools library" ON)
 cmake_dependent_option(MAGNUM_WITH_MATERIALTOOLS "Build MaterialTools library" ON "NOT MAGNUM_WITH_SCENECONVERTER" ON)
-cmake_dependent_option(MAGNUM_WITH_MESHTOOLS "Build MeshTools library" ON "NOT MAGNUM_WITH_OBJIMPORTER;NOT MAGNUM_WITH_SCENECONVERTER" ON)
+option(MAGNUM_WITH_PRIMITIVES "Build Primitives library" ON)
+cmake_dependent_option(MAGNUM_WITH_MESHTOOLS "Build MeshTools library" ON "NOT MAGNUM_WITH_OBJIMPORTER;NOT MAGNUM_WITH_SCENECONVERTER;NOT MAGNUM_WITH_PRIMITIVES" ON)
 option(MAGNUM_WITH_SCENEGRAPH "Build SceneGraph library" ON)
 cmake_dependent_option(MAGNUM_WITH_SCENETOOLS "Build SceneTools library" ON "NOT MAGNUM_WITH_SCENECONVERTER" ON)
 option(MAGNUM_WITH_SHADERS "Build Shaders library" ON)
@@ -226,7 +227,6 @@ cmake_dependent_option(MAGNUM_WITH_TEXT "Build Text library" ON "NOT MAGNUM_WITH
 cmake_dependent_option(MAGNUM_WITH_TEXTURETOOLS "Build TextureTools library" ON "NOT MAGNUM_WITH_TEXT;NOT MAGNUM_WITH_DISTANCEFIELDCONVERTER" ON)
 cmake_dependent_option(MAGNUM_WITH_TRADE "Build Trade library" ON "NOT MAGNUM_WITH_MATERIALTOOLS;NOT MAGNUM_WITH_MESHTOOLS;NOT MAGNUM_WITH_PRIMITIVES;NOT MAGNUM_WITH_SCENETOOLS;NOT MAGNUM_WITH_IMAGECONVERTER;NOT MAGNUM_WITH_ANYIMAGEIMPORTER;NOT MAGNUM_WITH_ANYIMAGECONVERTER;NOT MAGNUM_WITH_ANYSCENEIMPORTER;NOT MAGNUM_WITH_OBJIMPORTER;NOT MAGNUM_WITH_TGAIMAGECONVERTER;NOT MAGNUM_WITH_TGAIMPORTER" ON)
 cmake_dependent_option(MAGNUM_WITH_GL "Build GL library" ON "NOT MAGNUM_WITH_SHADERS;NOT MAGNUM_WITH_GL_INFO;NOT MAGNUM_WITH_ANDROIDAPPLICATION;NOT MAGNUM_WITH_WINDOWLESSIOSAPPLICATION;NOT MAGNUM_WITH_WINDOWLESSCGLAPPLICATION;NOT MAGNUM_WITH_WINDOWLESSGLXAPPLICATION;NOT MAGNUM_WITH_CGLCONTEXT;NOT MAGNUM_WITH_GLXAPPLICATION;NOT MAGNUM_WITH_GLXCONTEXT;NOT MAGNUM_WITH_XEGLAPPLICATION;NOT MAGNUM_WITH_WINDOWLESSWGLAPPLICATION;NOT MAGNUM_WITH_WGLCONTEXT;NOT MAGNUM_WITH_DISTANCEFIELDCONVERTER" ON)
-option(MAGNUM_WITH_PRIMITIVES "Build Primitives library" ON)
 
 cmake_dependent_option(MAGNUM_TARGET_GL "Build libraries with OpenGL interoperability" ON "MAGNUM_WITH_GL" OFF)