Fix rr::Print and add unit tests

* CMake: add REACTOR_ENABLE_PRINT to enable rr::Print macros (default 0).
  When enabled, defines ENABLE_RR_PRINT. Formerly, ENABLE_RR_PRINT was
  only defined in NDEBUG builds.
* CMake: REACTOR_EMIT_PRINT_LOCATION enables REACTOR_ENABLE_PRINT.
* Add missing includes of Print.hpp.
* Fix rr::Print compilation of non-const pointers.
* Fix rr::Print compilation of Int2 and UInt2.
* Fix rr::Print of Float outputting in square brackets.
* Fix rr::Print of Bool to output a '1' or '0' for 'true' and 'false'.
* Add unit tests for rr::Print of all primitive and Reactor types.
* Includes changes bclayton@ made to output "true"/"false" for Bool,
  and to correctly compare against implementation-specific printf of
  pointers.

Bug: b/149328074
Change-Id: Ibb17985201f1c2b432539cd1153293d1e1cbb5bb
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/41108
Reviewed-by: Ben Clayton <bclayton@google.com>
Tested-by: Antonio Maiorano <amaiorano@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>

src/Shader/ShaderCore.hpp

diff --git a/src/Shader/ShaderCore.hpp b/src/Shader/ShaderCore.hpp
index fd1ccb7..6a0b285 100644
--- a/src/Shader/ShaderCore.hpp
+++ b/src/Shader/ShaderCore.hpp
@@ -17,6 +17,7 @@
 
 #include "Shader.hpp"
 #include "Reactor/Reactor.hpp"
+#include "Reactor/Print.hpp"
 #include "Common/Debug.hpp"
 
 namespace sw