The declaration of the Implementation_Defined pragma was moved from the outer
scope to the scope of the nested package Implementation.

Tested on x86_64-pc-linux-gnu, committed on trunk

2011-10-16  Matthew Heaney  <heaney@adacore.com>

	* a-cusyqu.ads, a-cbsyqu.ads, a-cuprqu.ads, a-cbprqu.ads (package
	Implementation): Specify pragma Implementation_Defined.