Request for reviews (XS): 6790182: matcher.cpp:1375: assert(false,"bad AD file")

[Vladimir Kozlov]

http://webrev.invokedynamic.info/kvn/6790182/index.html

Fixed 6790182: matcher.cpp:1375: assert(false,"bad AD file")

Problem:
The problem is that a regD_low isn't considered a regD
so it can't match a sub with regDs.

Solution:
Add a match rule for regD_low in regD definition to declare
that a regD_low is also a regD.

Reviewed by:
Fix verified (y/n): y, bug's test case

Other testing:
JPRT