* cannon: Fix stack patching

And add `memprofilerate=0` to envp

* Update cannon/mipsevm/program/patch.go
Co-authored-by: protolambda <proto@protolambda.com>

* cleanup argv/envp string ptrs

* nit

* fix envar name

* Update cannon/mipsevm/program/patch.go
Co-authored-by: mbaxter <meredith@oplabs.co>

* align op-program arg0

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Co-authored-by: protolambda <proto@protolambda.com>
Co-authored-by: mbaxter <meredith@oplabs.co>