Sprinkle some Intel GPU support on Linux

indra/llrender/llgl.cpp

@@ -755,10 +755,12 @@ bool LLGLManager::initGL()
 #endif
 	stop_glerror();
 
+#if LL_WINDOWS
 	if (mIsIntel && mGLVersion <= 3.f)
 	{ //never try to use framebuffer objects on older intel drivers (crashy)
 		mHasFramebufferObject = FALSE;
 	}
+#endif
 
 	stop_glerror();
 	

indra/llrender/llshadermgr.cpp

@@ -550,7 +550,7 @@ GLhandleARB LLShaderMgr::loadShaderFile(const std::string& filename, S32 & shade
 			LL_WARNS("ShaderLoading") << "GL ERROR entering loadShaderFile(): " << error << LL_ENDL;
 		}
 	}
-	
+
 	LL_DEBUGS("ShaderLoading") << "Loading shader file: " << filename << " class " << shader_level << LL_ENDL;
 
 	if (filename.empty())