doc: configure yajl lib for acrn driver in libvirt

Acrn driver in libvirt needs to handle JSON command or
JSON message to interact with command monitor in ACRN DM.

In libvirt, JSON APIs implementation depends on yajl lib.
So yajl should be configured for libvirt.

v1-->v2:
	Remove description about checkout hypervisor tag
	since libvirt can work on the latest hypervisor.
	Libvirt doesn't depend on acrnd and acrnctl now,
	remove acrnd and acrnctl installation in this document.

Tracked-On: #5921

Signed-off-by: Xiangyang Wu <xiangyang.wu@intel.com>

doc/tutorials/setup_openstack_libvirt.rst

@@ -164,14 +164,10 @@ Set Up ACRN Prerequisites Inside the Container
       $ cd ~
       $ git clone https://github.com/projectacrn/acrn-hypervisor
       $ cd acrn-hypervisor
-      $ git checkout v2.4
       $ make
       $ sudo make devicemodel-install
-      $ sudo cp build/misc/debug_tools/acrnd /usr/bin/
-      $ sudo cp build/misc/debug_tools/acrnctl /usr/bin/
 
-   Install only the user-space components: ``acrn-dm``, ``acrnctl``, and
-   ``acrnd`` as shown above.
+   Install only the user-space component: ``acrn-dm`` as shown above.
 
    .. note:: Use the tag that matches the version of the ACRN hypervisor (``acrn.bin``)
       that runs on your system.
@@ -183,7 +179,7 @@ Set Up Libvirt
 
      $ sudo apt install libdevmapper-dev libnl-route-3-dev libnl-3-dev python \
        automake autoconf autopoint libtool xsltproc libxml2-utils gettext \
-       libxml2-dev libpciaccess-dev gnutls-dev python3-docutils
+       libxml2-dev libpciaccess-dev gnutls-dev python3-docutils libyajl-dev
 
 
 2. Download libvirt/ACRN::
@@ -198,7 +194,7 @@ Set Up Libvirt
      $ cd build
      $ ../autogen.sh --prefix=/usr --disable-werror --with-test-suite=no \
        --with-qemu=no --with-openvz=no --with-vmware=no --with-phyp=no \
-       --with-vbox=no --with-lxc=no --with-uml=no --with-esx=no
+       --with-vbox=no --with-lxc=no --with-uml=no --with-esx=no --with-yajl
 
      $ make
      $ sudo make install