apibuild: Fix indentation not multiple of 4
apibuild: Fix indentation not multiple of 4

PEP8 recommends that the number of spaces used for indentation of
Python code to be a multiple of four [1] [2].

1: https://lintlyci.github.io/Flake8Rules/rules/E111.html
2: https://lintlyci.github.io/Flake8Rules/rules/E114.html

Reviewed-by: Daniel P. Berrangé <bb938cf255e055ff3507f2627d214e8e62118fcf@redhat.com>
Signed-off-by: Radostin Stoyanov <31e0ffafc95759db9487554f968b40977ab67b6b@gmail.com>

fabianfreyer/libvirt,nertpinx/libvirt,zippy2/libvirt,jardasgit/libvirt,olafhering/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,eskultety/libvirt,eskultety/libvirt,andreabolognani/libvirt,nertpinx/libvirt,libvirt/libvirt,eskultety/libvirt,jardasgit/libvirt,olafhering/libvirt,eskultety/libvirt,andreabolognani/libvirt,olafhering/libvirt,jardasgit/libvirt,fabianfreyer/libvirt,zippy2/libvirt,crobinso/libvirt,andreabolognani/libvirt,andreabolognani/libvirt,olafhering/libvirt,nertpinx/libvirt,crobinso/libvirt,libvirt/libvirt,zippy2/libvirt,jfehlig/libvirt,zippy2/libvirt,jfehlig/libvirt,nertpinx/libvirt,nertpinx/libvirt,libvirt/libvirt,fabianfreyer/libvirt,crobinso/libvirt,jfehlig/libvirt,jardasgit/libvirt,libvirt/libvirt,jfehlig/libvirt,andreabolognani/libvirt,eskultety/libvirt,crobinso/libvirt