PPC: exclude test for AIX due to issue 2857

cctest/test-log/EquivalenceOfLoggingAndTraversal fails on
AIX because it does not correctly handle the full 64 bit
address space supported by AIX.  SKIP until the issue
is resolved.

	modified:   test/cctest/cctest.status

R=danno@chromium.org, svenpanne@chromium.org

BUG=

Review URL: https://codereview.chromium.org/1055183002

Cr-Commit-Position: refs/heads/master@{#27608}

test/cctest/cctest.status

@@ -393,6 +393,14 @@
 
 }],  # 'arch == nacl_ia32 or arch == nacl_x64'
 
+##############################################################################
+['system == aix and arch == ppc64', {
+
+  # BUG 2857
+  'test-log/EquivalenceOfLoggingAndTraversal' : [SKIP],
+
+}],  # 'system == aix and arch == ppc64'
+
 ##############################################################################
 ['arch == ppc and simulator_run == True or arch == ppc64 and simulator_run == True', {