[mips] update expected output in test/ELF/mips-plt-r6.s
[mips] update expected output in test/ELF/mips-plt-r6.s

r306095 in LLVM has changed register positions for instruction aui.
This change updates the test that checks for aui.


git-svn-id: f6089bf0e6284f307027cef4f64114ee9ebb0424@306173 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lld,llvm-mirror/lld