[C++ for OpenCL] Set version to 1.0. (#513)

Fix the version now, the evolution of the language
should continue as follows:
- Any extra clarification can be part of the language
  version.
- Any new functionality should be added with a new minor
  or major version.
- Backward compatibility changes are not desirable but if
  occur should become part of the major version.

Author: AnastasiaStulova

CXX_for_OpenCL.txt

@@ -2,7 +2,7 @@
 // Creative Commons Attribution 4.0 International License; see
 // http://creativecommons.org/licenses/by/4.0/
 
-= The C++ for OpenCL Programming Language Documentation (Draft)
+= The C++ for OpenCL 1.0 Programming Language Documentation
 :R: pass:q,r[^(R)^]
 Khronos{R} OpenCL Working Group
 :data-uri: