Lazy shader update. attribute -> ATTRIBUTE, varying -> VARYING. Moved some shader preprocessor stuff from llviewershadermgr.cpp to llshadermgr.cpp to match LL (although it looks more messy)

indra/newview/app_settings/shaders/class2/effects/blurF.glsl

@@ -11,7 +11,7 @@
 uniform sampler2DRect RenderTexture;
 uniform float bloomStrength;
 
-varying vec4 gl_TexCoord[gl_MaxTextureCoords];
+VARYING vec4 gl_TexCoord[gl_MaxTextureCoords];
 
 float blurWeights[4] = float[4](.05,.1,.2,.3);