[asan] Fix one test on Android N.

A fake strtol interceptor should at least make forward progress.

llvm-svn: 286187

compiler-rt/test/asan/TestCases/interception_failure_test.cc

@@ -16,6 +16,8 @@
 
 extern "C" long strtol(const char *nptr, char **endptr, int base) {
   fprintf(stderr, "my_strtol_interceptor\n");
+  if (endptr)
+    *endptr = (char*)nptr + strlen(nptr);
   return 0;
 }