Failures on Ubuntu-AArch32-native-gdbserver-m32, branch master

[sergiodj+buildbot@sergiodj.net]

Buildslave:
	ubuntu-trusty-aarch32-1

Full Build URL:
	<http://gdb-build.sergiodj.net/builders/Ubuntu-AArch32-native-gdbserver-m32/builds/1147>

Commit(s) tested:
	206726fbfdd521fbb184daedb71b85030453bf0b

Author(s) (in the same order as the commits):
	Sergio Durigan Junior <sergiodj@redhat.com>

Subject:
	Fix PR gdb/21954: make 'unset environment' work again

Testsuite log (gdb.sum and gdb.log) URL(s):
	<http://gdb-build.sergiodj.net/results/Ubuntu-AArch32-native-gdbserver-m32/20/206726fbfdd521fbb184daedb71b85030453bf0b/>

*** Diff to previous build ***
============================
PASS -> FAIL: gdb.base/longjmp.exp: next over patt3
PASS -> FAIL: gdb.mi/mi-var-rtti.exp: run to mi-var-rtti.cc:93
new FAIL: gdb.threads/interrupt-while-step-over.exp: displaced-stepping=off: iter=9: wait for stops
new FAIL: gdb.threads/interrupt-while-step-over.exp: displaced-stepping=off: iter=10: wait for stops
new FAIL: gdb.threads/interrupt-while-step-over.exp: displaced-stepping=off: iter=11: wait for stops
new FAIL: gdb.threads/interrupt-while-step-over.exp: displaced-stepping=off: iter=16: wait for stops
new FAIL: gdb.threads/interrupt-while-step-over.exp: displaced-stepping=off: iter=18: wait for stops
============================


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

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