[RCAR] Fixed missing definition about virtual/egl

[RCAR] Fixed missing definition about virtual/egl

Sometimes, libepoxy has an error during do_configure.
PREFERRED_PROVIDER_virtual/egl definition in agl_m3ulcb
was changed to virtual-gles-user-module from libegl.
To fix this missing dependency, add virtual/egl definition in
virtual-gles-user-module.

------
checking for egl... no
configure: error: Package requirements (egl) were not met:

No package 'egl' found
------

Change-Id: Ia6915af2a8babbbd3353513cc2c115387f6e178c
Signed-off-by: Harunobu Kurokawa <harunobu.kurokawa.dn@renesas.com>