IMPALA-1572: backout attempt to execute SSSE3 instruction

Executing the MMX instruction had the unaccounted for side-effect
of reseting the FPU tag word, which caused FPU corruption in
Java code (String.format("%f")).  The safest fix is to backout
the attempt to execute the instruction.

Change-Id: I5eb5819574966e73f61b5cb3f340da32c71d0851
(cherry picked from commit d52734a58711326cea1b5188c08fbe6c95b409ea)
Reviewed-on: http://gerrit.sjc.cloudera.com:8080/5511
Reviewed-by: Daniel Hecht <dhecht@cloudera.com>
Tested-by: jenkins