Remove erroneous 'inline' on LLPanelStandStopFlying::getInstance()

This is ignored by every compiler except Linux g++ 4.4.3 in Release mode. In
that case, it literally does cause getInstance() to be inlined, therefore
llmoveview.o contains no such symbol, therefore the Linux viewer link fails in
Release mode. But for a method implementation in a .cpp file of a method
declared in a .h file, 'inline' is just wrong. Removing it fixes Release build.

indra/newview/llmoveview.cpp

@@ -552,7 +552,7 @@ LLPanelStandStopFlying::LLPanelStandStopFlying() :
 }
 
 // static
-inline LLPanelStandStopFlying* LLPanelStandStopFlying::getInstance()
+LLPanelStandStopFlying* LLPanelStandStopFlying::getInstance()
 {
 	static LLPanelStandStopFlying* panel = getStandStopFlyingPanel();
 	return panel;