Set host bootflags with sudo only sets the first bootflag and ignores the rest of the string

```
[dmishin@comet-fe4 ~]$ rocks set host bootflags comet-31-20 flags="intel_iommu=on iommu=pt pci=realloc rdblacklist=nvidia"
[dmishin@comet-fe4 ~]$ rocks report host bootflags comet-31-20
intel_iommu=on
```