[vector] [Byte|Short]Vector: No intrinsics for shift*

[Vladimir Ivanov]

Hi,

I stumbled upon a missing intrinsics for shiftL/shiftR/aShiftR on 
byte/short vectors [1].

Just curious what's the plan?

PS: while browsing other concrete classes, found that 
IntVector.[rotate|shift][EL|ER] [2] aren't intrinsified as well. Same 
question.

Best regards,
Vladimir Ivanov

[1] 
http://hg.openjdk.java.net/panama/dev/file/aa68196d5ef3/src/jdk.incubator.vector/share/classes/jdk/incubator/vector/Short256Vector.java#l468

[2] 
http://hg.openjdk.java.net/panama/dev/file/aa68196d5ef3/src/jdk.incubator.vector/share/classes/jdk/incubator/vector/Int256Vector.java#l872