regress: add a testcase for NASM syntax

suite/regress/x86_nasm.py

+#!/usr/bin/python
+# Nguyen Anh Quynh, 2016
+
+# This is to test NASM syntax
+
+# Fill in the information in the form below when you create a new regression
+
+# Github issue: #7
+# Author: Nguyen Anh Quynh
+
+from keystone import *
+
+import regress
+
+class TestX86(regress.RegressTest):
+    def runTest(self):
+        # Initialize Keystone engine
+        ks = Ks(KS_ARCH_X86, KS_MODE_32)
+        # change the syntax to NASM
+        ks.syntax = KS_OPT_SYNTAX_NASM
+        # compile an instruction in NASM syntax
+        encoding, count = ks.asm("mov dword [eax], 0x42424242")
+        # Assert the result
+        self.assertEqual(encoding, [ 0xc7, 0x00, 0x42, 0x42, 0x42, 0x42 ])
+
+if __name__ == '__main__':
+    regress.main()