lttng-ust: add aarch64 recognition

Treat the same as "arm".

Upstream-Status: Pending

Signed-off-by: Joe Slater <joe.slater@windriver.com>

The patch was imported from OpenEmbedded mailing list
http://lists.openembedded.org/pipermail/openembedded-core/2014-September/097135.html.

Besides recognizing aarch64, it was also necessary to recognize aarch64_be.

Signed-off-by: Adrian Calianu <adrian.calianu@enea.com>
Signed-off-by: Alexandru.Vaduva <Alexandru.Vaduva@enea.com>

---
diff --git a/configure.ac b/configure.ac
index f507883..40a57d8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -194,6 +194,8 @@ changequote([,])dnl
	s390) NO_UNALIGNED_ACCESS=1 ;;
	s390x) NO_UNALIGNED_ACCESS=1 ;;
         arm*) NO_UNALIGNED_ACCESS=1 ;;
+        aarch64) NO_UNALIGNED_ACCESS=1 ;;
+        aarch64_be) NO_UNALIGNED_ACCESS=1 ;;
	mips*) NO_UNALIGNED_ACCESS=1 ;;
	tile*) NO_UNALIGNED_ACCESS=1 ;;
	*) AC_MSG_ERROR([unable to detect alignment requirements (unsupported architecture ($host_cpu)?)]) ;;