gpu-viv-bin-mx6q: Add a rdepends of 'libglslc-mx6' in libgles2-mx6

gpu-viv-bin-mx6q: Add a rdepends of 'libglslc-mx6' in libgles2-mx6

This fixes runtime errors as:

,----
| VertexShader: chiclet.vert: comiple error
| FragmentShader: chiclet.frag: comiple error
| ShaderProgram: null vertex program
| Segmentation fault
`----

The rdepends needs to be explicitly add as the library is loaded at
runtime so it is not possible to discovery that it is required
automatically.

Change-Id: I39c0c1c8019f9fd5c0561f9ebddeeb31f31c6e97
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>