This adds an RM reference to J.2 for the run-time routines that allow
colon as a replacement for hash in based notation. Comment changes
only, no external effect, so no test.

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

2015-01-06  Robert Dewar  <dewar@adacore.com>

	* s-valllu.adb, a-tiinau.adb, a-timoau.adb, a-ztinau.adb, a-ztmoau.adb,
	s-valuns.adb, s-valrea.adb, a-wtflau.adb, a-tiflau.adb, a-ztflau.adb,
	a-wtinau.adb, a-wtmoau.adb: Document recognition of : in place of #.