[BUG] sysroot_linux-64 update required

[lohedges]

I'm having trouble finding this online, but it seems that the default sysroot_linux-64 version might have changed for conda-forge. For the most recent openmm package, version 2.17 is listed in the build section of the meta.yaml, whereas 2.34 is listed in the host section. This means that we can't link against libOpenMM during our build without matching versions 2.34.