meson: Fix libtool version number
meson: Fix libtool version number

libtool uses CURRENT:REVISION:AGE for library versions and the formula
for calculating the file numbers is (CURRENT-AGE).(AGE).(REVISION). To
keep compatibility with libtool, meson build should follow the same
formula

With this fix, we will avoid https://github.com/intel/libva/issues/181
when bumping a new version

Signed-off-by: Xiang, Haihao <8d677183e5993577d4fa73a419b76987913292d6@intel.com>

01org/libva-cros,01org/libva-cros,01org/libva-cros