build-aux:check-spacing: Add wrapper function of CheckFunctionBody
build-aux:check-spacing: Add wrapper function of CheckFunctionBody

This patch adds CheckFunctionBody to simplifies check-spacing.

Signed-off-by: Shi Lei <79e2d1a953a210f9f0c36cafbe946414d6421d20@massclouds.com>

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