Failures on RHEL-s390x-m64, branch master

[sergiodj+buildbot@redhat.com]

Buildslave:
	rhel-7.1-s390x-1

Full Build URL:
	<http://gdb-build.sergiodj.net/builders/RHEL-s390x-m64/builds/837>

Commit(s) tested:
	b593e3d9b00b09af43abf1e95d68e68200e3c2a5

Author(s) (in the same order as the commits):
	Ruslan Kabatsayev <b7.10110111@gmail.com>

Subject:
	Fix wrong output of x87 registers due to truncation to double on amd64

Testsuite log (gdb.sum and gdb.log) URL(s):
	<http://gdb-build.sergiodj.net/cgit/RHEL-s390x-m64/.git/tree/?h=master&id=22709efa41bf17b8c74f7ed5a7dcfd94178d78c4>

*** Regressions found ***
============================
new FAIL: gdb.threads/signal-while-stepping-over-bp-other-thread.exp: step (pattern 3)
============================


*** Regressions against the baseline ***
============================
new FAIL: gdb.base/gnu_vector.exp: verify vector return value
PASS -> FAIL: gdb.threads/watchthreads.exp: threaded watch loop
PASS -> FAIL: gdb.threads/watchthreads.exp: combination of threaded watchpoints = 30
============================