To avoid having a library name mismatch between the LIBRARY lines of
the .def files and the output from the GN files, the output names
were restored to libEGL and libGLESv2, but the output directories
were changed to avoid clashing with the ANGLE libraries.

Also removed the warning silencing that's no longer required.

Change-Id: Ifa13d302ffa19acc04e46e4c772fa407a1c818bc
Reviewed-on: https://swiftshader-review.googlesource.com/5810Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Corentin Wallez <cwallez@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>