* iconvdata/ksc5601.c (__ksc5601_sym_to_ucs): Add mapping for
	0xa2e6 and 0xa2e7.
	(__ksc5601_sym_from_ucs): Add mapping back from U00AE and U20AC.
	* iconvdata/ksc5601.h (KSC5601_SYMBOL): Adjust for the two new
	mappings.
	* iconvdata/testdata/EUC-KR: Add Euro and Registered sign.
	* iconvdata/testdata/ISO-2022-KR: Likewise.