Merge pull request itanium-cxx-abi#53 from MaskRay/ieee

IEEE 758 -> IEEE 754

Author: rjmccall

abi.html

@@ -5205,7 +5205,7 @@ <h5><a href="#mangling.literal">5.1.6.1 Literals</a></h5>
 Floating-point literals are encoded using a fixed-length lowercase
 hexadecimal string corresponding to the internal representation,
 high-order bytes first.  For example: "Lf bf800000 E" is -1.0f on
-platforms conforming to IEEE 758.
+platforms conforming to IEEE 754.
 
 <p>
 The encoding for a literal of an enumerated type is the encoding of the