libxml2: add shared library version info to libxml shared libraries
This fixes an issue with RPM where it checks version imformation for
binaries linked against libxml and fails because it's missing info
| error: Failed dependencies:
| libxml2.so.2(LIBXML2_2.6.0) is needed by fmc-0.9.7+2-r2.1.ppce500mc
| libxml2.so.2(LIBXML2_2.4.30) is needed by fmc-0.9.7+2-r2.1.ppce500mc
| ERROR: Function 'do_rootfs' failed (see
Note: fmc is just an example recipe/name
Signed-off-by: Matthew McClintock <msm@freescale.com>
