[bug-fdisk] building fdisk 2.0.0a1 requires 2.0.0a

[Brandon Invergo]

Hello,
There appears to be a bug in the configure scripts for the fdisk 2.0.0a1
backend. When running ./configure, the process halts during the
backend/configure with the following problem:

checking gnufdisk-common.h usability... no
checking gnufdisk-common.h presence... no
checking for gnufdisk-common.h... no
configure: error: GNU Fdisk headers are missing, install headers and try again.
configure: error: ../../backend/configure failed for backend

However, if one first installs 2.0.0a (which installs without problems)
and then returns to install 2.0.0a1, the configuration process may
proceed and the build completes successfully.

Unfortunately, I'm not sure how best to fix the problem. I hope this
information can help!

Cheers,
Brandon Invergo