Failures on Fedora-x86_64-m64, branch master

[sergiodj+buildbot@sergiodj.net]

Buildslave:
	fedora-x86-64-4

Full Build URL:
	<http://gdb-build.sergiodj.net/builders/Fedora-x86_64-m64/builds/8791>

Commit(s) tested:
	a37a2ae7080898244de86d136961de81fe28a434

Author(s) (in the same order as the commits):
	Tom Tromey <tom@tromey.com>

Subject:
	Use std::string in execute_script_contents

Testsuite log (gdb.sum and gdb.log) URL(s):
	<http://gdb-build.sergiodj.net/results/Fedora-x86_64-m64/a3/a37a2ae7080898244de86d136961de81fe28a434/>

*** Diff to previous build ***
============================
PASS -> FAIL: gdb.arch/amd64-disp-step-avx.exp: vex2: xmm0 has expected value before
============================


*** Complete list of XFAILs for this builder ***

To obtain the list of XFAIL tests for this builder, go to:

	<http://git.sergiodj.net/?p=gdb-xfails.git;a=blob;f=xfails/Fedora-x86_64-m64/xfails/master/xfail;hb=d27b3b9>

You can also see a pretty-printed version of the list, with more information
about each XFAIL, by going to:

	<http://git.sergiodj.net/?p=gdb-xfails.git;a=blob;f=xfails/Fedora-x86_64-m64/xfails/master/xfail.table;hb=d27b3b9>