The py2_build_wheel macro was evaluating to a command
that failed to build libvirt-python.
libvirt-python has its own set of CFLAGS so those are
being used.
This also fixes the scenario where a non centos build env
would have been missing the BuildRequires for the wheel command.
Closes-Bug: 1799735
Change-Id: Ib9cf8a120069fa15f1832c925c2ba56c6ee8e971
Signed-off-by: Al Bailey <Al.Bailey@windriver.com>
b9d034298f