Add more external programs used by the library

https://bugzilla.redhat.com/show_bug.cgi?id=1989514#c19

Thanks: Alice Frose, Andrea Bolognani

libguestfs.spec

@@ -58,7 +58,7 @@ Summary:       Access and modify virtual machine disk images
 Name:          libguestfs
 Epoch:         1
 Version:       1.47.2
-Release:       5%{?dist}
+Release:       6%{?dist}
 License:       LGPLv2+
 
 # Build only for architectures that have a kernel
@@ -333,8 +333,11 @@ Requires:      yajl%{?_isa}
 # For core mount-local (FUSE) API.
 Requires:      fuse
 
-# For core disk-create API.
+# For core APIs:
 Requires:      /usr/bin/qemu-img
+Requires:      coreutils
+Requires:      grep
+Requires:      tar
 
 # For qemu direct and libvirt backends.
 Requires:      qemu-kvm-core
@@ -1140,6 +1143,9 @@ rm ocaml/html/.gitignore
 
 
 %changelog
+* Mon Feb 28 2022 Richard W.M. Jones <rjones@redhat.com> - 1:1.47.2-6
+- Add more external programs used by the library
+
 * Tue Feb 08 2022 Richard W.M. Jones <rjones@redhat.com> - 1:1.47.2-5
 - Bump and rebuild for eln