meson: drop all unused bits from configure.ac
meson: drop all unused bits from configure.ac

AC_CANONICAL_HOST adds --host option to configure which is provided
automatically by Meson as --cross-file.

All of the AC_PROG_CC, AC_PROG_INSTALL, AC_PROG_CPP, AM_PROG_CC_C_O,
AM_PROG_LD, PKG_PROG_PKG_CONFIG are automatically checked by Meson.

libtool is not used by meson so there is no need for that as well and
the remaining directives are not relevant for Meson.

Signed-off-by: Pavel Hrdina <d4772d05997b8abf035041e3b4f4996380ea7e7a@redhat.com>
Reviewed-by: Peter Krempa <2cf5c04c61aa466e4a47bfedc747d17279c72ffc@redhat.com>
Reviewed-by: Neal Gompa <8135daa3762340227c0c67f1c47ad07a127bd3a3@gmail.com>

crobinso/libvirt,nertpinx/libvirt,jardasgit/libvirt,jardasgit/libvirt,olafhering/libvirt,jfehlig/libvirt,zippy2/libvirt,crobinso/libvirt,nertpinx/libvirt,olafhering/libvirt,jfehlig/libvirt,jfehlig/libvirt,nertpinx/libvirt,jardasgit/libvirt,libvirt/libvirt,jardasgit/libvirt,libvirt/libvirt,nertpinx/libvirt,olafhering/libvirt,libvirt/libvirt,zippy2/libvirt,zippy2/libvirt,nertpinx/libvirt,olafhering/libvirt,libvirt/libvirt,jfehlig/libvirt,jardasgit/libvirt,crobinso/libvirt,zippy2/libvirt,crobinso/libvirt