Disable srec tests.

--- ./ld/testsuite/ld-srec/srec.exp.aa	2014-08-04 10:28:16.313705173 -0700

+++ ./ld/testsuite/ld-srec/srec.exp	2014-08-04 10:29:30.839147853 -0700

@@ -391,6 +391,8 @@

 # generate the format if need be).

 setup_xfail "tile*-*-*"

+setup_xfail "powerpc64le*-*-*"

+

 run_srec_test $test1 "tmpdir/sr1.o tmpdir/sr2.o"

 # Now try linking a C++ program with global constructors and

@@ -421,5 +423,6 @@

 setup_xfail "score-*-*"

 setup_xfail "bfin-*-linux-uclibc"

 setup_xfail "tile*-*-*"

+setup_xfail "powerpc64le*-*-*"

 run_srec_test $test2 "tmpdir/sr3.o"