ada: Spurious style error with mutiple square brackets

ada: Spurious style error with mutiple square brackets

This patch fixes a spurious error in the compiler when checking for style for
token separation where two square brackets are next to each other.

gcc/ada/

	* csets.ads (Identifier_Char): New function - replacing table.
	* csets.adb (Identifier_Char): Rename and move table for static values.
	(Initialize): Remove dynamic calculations.
	(Identifier_Char): New function to calculate dynamic values.
	* opt.adb (Set_Config_Switches): Remove setting of Identifier_Char.