Make crosperf unit tests executable.

BUG=None
TEST=None

Change-Id: I77e305e4e8711c86116838fd77fcc93fac2c7dc1
Reviewed-on: https://chrome-internal-review.googlesource.com/219922
Reviewed-by: Caroline Tice <cmtice@google.com>
Commit-Queue: Caroline Tice <cmtice@google.com>
Tested-by: Caroline Tice <cmtice@google.com>
diff --git a/crosperf/benchmark_unittest.py b/crosperf/benchmark_unittest.py
old mode 100644
new mode 100755
diff --git a/crosperf/crosperf_unittest.py b/crosperf/crosperf_unittest.py
old mode 100644
new mode 100755
diff --git a/crosperf/download_images_buildid_test.py b/crosperf/download_images_buildid_test.py
old mode 100644
new mode 100755
diff --git a/crosperf/download_images_unittest.py b/crosperf/download_images_unittest.py
old mode 100644
new mode 100755
diff --git a/crosperf/settings_factory_unittest.py b/crosperf/settings_factory_unittest.py
old mode 100644
new mode 100755
diff --git a/crosperf/settings_unittest.py b/crosperf/settings_unittest.py
old mode 100644
new mode 100755
diff --git a/crosperf/suite_runner_unittest.py b/crosperf/suite_runner_unittest.py
old mode 100644
new mode 100755