gtest fails when run from make with read-only source directory

In an out-of-tree build where the source code is in a read-only location several gtests such as LogFileOutput.invalid_file_test_vm will fail because they write files to the current working directory.

[ RUN ] LogFileOutput.invalid_file_test_vm
# To suppress the following error report, specify this argument
# after -XX: or in .hotspotrc: SuppressErrorAt=/logTestUtils.inline.hpp:65
assert failed: failed to create directory tmplogdir
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/mnt/nicgas01-pc/jdk/test/hotspot/gtest/logging/logTestUtils.inline.hpp:65), pid=51470, tid=51470
# assert(!failed) failed: failed to create directory tmplogdir