JIT: Fix inconsistent handling of sub-word instance git/put

The portable interpreter and fast interpreter use 32-bit accesses
for all sub-word scalars.  The JIT generated code to tailor the access
to the data size.  It doesn't matter which approach is taken, but all
interpreters & JIT must be consistent.  Changing the JIT to use 32-bit
accesses for all sub-word instance scalars.

Fix for Issue 2973137

Change-Id: I8b1e9e6be075012c7c174728b77c7a76884975b7
1 file changed