libguestfs: install into vendor_perl, cleanups.

disable_parallel_build, else ocaml can fail.

srcpkgs/libguestfs/template

@@ -1,9 +1,10 @@
 # Template file for 'libguestfs'
 pkgname=libguestfs
 version=1.37.21
-revision=1
+revision=2
 _version_short=${version%.*}
 build_style=gnu-configure
+make_install_args="INSTALLDIRS=vendor"
 configure_args="--disable-static --disable-probes --disable-appliance
  --disable-daemon --without-java --enable-introspection=no
  --disable-erlang --disable-haskell --disable-gobject --without-gtk
@@ -28,6 +29,7 @@ etc/xdg/virt-builder/repos.d/libguestfs.gpg"
 
 nopie=yes
 nocross=yes
+disable_parallel_build=yes
 
 only_for_archs="i686 x86_64"