purism-librem5: add librem5-base ver to pkgdesc
Make it easier to look up the librem5-base version that was used in the
device-purism-librem5 package, e.g. for writing service pack release
notes:
> Purism Librem 5 Phone (librem5-base: 58pureos1)
Make it easier to look up the librem5-base version that was used in the
device-purism-librem5 package, e.g. for writing service pack release
notes:
> Purism Librem 5 Phone (librem5-base: 58pureos1)