Build improvements (improved CMakeLists.txt, added proper support for testing)

test/asmjit_test_x86_asm.cpp

@@ -4,12 +4,11 @@
 // [License]
 // Zlib - See LICENSE.md file in the package.
 
+#include <asmjit/x86.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
-#include "./asmjit.h"
-
 using namespace asmjit;
 
 // Signature of the generated function.