[AIX][test-suite] Create a new reference output for ldecod on AIX

This patch creates a new reference file on AIX for the ldecod benchmark.
The output on AIX and Linux is the same, except that on AIX, a blank space is printed
when we a print NULL, in place of a (null) that is printed on Linux.

Differential Revision: https://reviews.llvm.org/D103066
1 file changed