scons: move cereal library exports to cereal submodule (#31617)

* cleanup-cereal

* bump
old-commit-hash: f293f7bad4

SConstruct

@@ -96,8 +96,6 @@ lenv = {
 rpath = lenv["LD_LIBRARY_PATH"].copy()
 
 if arch == "larch64":
-  lenv["LD_LIBRARY_PATH"] += ['/data/data/com.termux/files/usr/lib']
-
   cpppath = [
     "#third_party/opencl/include",
   ]
@@ -360,13 +358,6 @@ Export('common', 'gpucommon')
 # Build cereal and messaging
 SConscript(['cereal/SConscript'])
 
-cereal = [File('#cereal/libcereal.a')]
-messaging = [File('#cereal/libmessaging.a')]
-visionipc = [File('#cereal/libvisionipc.a')]
-messaging_python = [File('#cereal/messaging/messaging_pyx.so')]
-
-Export('cereal', 'messaging', 'messaging_python', 'visionipc')
-
 # Build other submodules
 SConscript([
   'body/board/SConscript',