Import dexter test-data from tools/base.

Make the dexter tests runnable by providing the test data.

Test: python tools/dexter/dexter/dexter_tests.py

Taken from: project:   platform/tools/base
            directory: profiler/native/testdata/dex 
            commit:    f975979b83

Change-Id: Ie21d4bcb6e7f0e361c72d68b9a8d5359e6a24a5f