NORSPEC-311 fix alpha / opaque lighting diffs

indra/newview/app_settings/settings.xml

.../newview/app_settings/shaders/class1/deferred/alphaF.glsl

...ettings/shaders/class1/deferred/fullbrightAlphaMaskF.glsl

...iew/app_settings/shaders/class1/deferred/fullbrightF.glsl

...iew/app_settings/shaders/class1/deferred/fullbrightV.glsl

...ngs/shaders/class1/deferred/postDeferredGammaCorrect.glsl

indra/newview/lldrawpoolalpha.cpp

indra/newview/lldrawpoolsimple.cpp

indra/newview/llviewershadermgr.cpp

indra/newview/llviewershadermgr.h

indra/newview/pipeline.cpp