When libEGL and either libGLESv2 or libGLES_CM are in a different
folder from the executable's folder, libEGL wasn't successfully
finding libGLESv2/libGLES_CM (or vice versa). Since these libraries
are generally in the same folder, using the current library's folder
as a starting location to find another library solves this issue.

Change-Id: Ice9217411de4e269d511549411297b57fc1a4bbb
Reviewed-on: https://swiftshader-review.googlesource.com/18548Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>