Add support for z/OS XL compiler inline asm syntax (#1063)

On s390 architecture, z/OS XL compiler uses HLASM inline assembly, which has different syntax and needs to be distinguished to avoid compilation error.

CONTRIBUTORS

diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 7071d7b..d2f6435 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -41,6 +41,7 @@
 Eric Fiselier <eric@efcs.ca>
 Eugene Zhuk <eugene.zhuk@gmail.com>
 Evgeny Safronov <division494@gmail.com>
+Fanbo Meng <fanbo.meng@ibm.com>
 Federico Ficarelli <federico.ficarelli@gmail.com>
 Felix Homann <linuxaudio@showlabor.de>
 Geoffrey Martin-Noble <gcmn@google.com> <gmngeoffrey@gmail.com>