selftests/powerpc: Make git ignore all binaries in powerpc test suite

This patch includes all of the powerpc test binaries into the .gitignore
file listing in their respective directories. This will make sure that
git ignores all of these test binaries when displaying status.
Signed-off-by: NAnshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

tools/testing/selftests/powerpc/copyloops/.gitignore

+copyuser_64
+copyuser_power7
+memcpy_64
+memcpy_power7

tools/testing/selftests/powerpc/mm/.gitignore

+hugetlb_vs_thp_test

tools/testing/selftests/powerpc/pmu/.gitignore

+count_instructions
+l3_bank_test
+per_event_excludes

tools/testing/selftests/powerpc/pmu/ebb/.gitignore

+reg_access_test
+event_attributes_test
+cycles_test
+cycles_with_freeze_test
+pmc56_overflow_test
+ebb_vs_cpu_event_test
+cpu_event_vs_ebb_test
+cpu_event_pinned_vs_ebb_test
+task_event_vs_ebb_test
+task_event_pinned_vs_ebb_test
+multi_ebb_procs_test
+multi_counter_test
+pmae_handling_test
+close_clears_pmcc_test
+instruction_count_test
+fork_cleanup_test
+ebb_on_child_test
+ebb_on_willing_child_test
+back_to_back_ebbs_test
+lost_exception_test
+no_handler_test
+cycles_with_mmcr2_test

tools/testing/selftests/powerpc/primitives/.gitignore

+load_unaligned_zeropad

tools/testing/selftests/powerpc/tm/.gitignore

+tm-resched-dscr