[AIX][tests] XFAIL -ftime-trace test for now

This test is failing due to D150282. XFAIL this test for now while it's being investigated to get the AIX bot green.

Author: jakeegan

clang/test/Driver/ftime-trace.cpp

@@ -1,3 +1,6 @@
+// Failing on AIX due to D150282
+// XFAIL: target={{.*}}-aix{{.*}}
+
 // RUN: rm -rf %t && mkdir -p %t && cd %t
 // RUN: %clangxx -S -no-canonical-prefixes -ftime-trace -ftime-trace-granularity=0 -o out %s
 // RUN: cat out.json \