Remove the Radiance compiler copy and use OpenGL's instead.

Bug 18591036

Change-Id: I17158acfa126490e28076052e5937d1deafd96c1
Reviewed-on: https://swiftshader-review.googlesource.com/1691
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>

src/OpenGL/compiler/ossource_posix.cpp

diff --git a/src/OpenGL/compiler/ossource_posix.cpp b/src/OpenGL/compiler/ossource_posix.cpp
index 1e1e699..f8ed83b 100644
--- a/src/OpenGL/compiler/ossource_posix.cpp
+++ b/src/OpenGL/compiler/ossource_posix.cpp
@@ -7,7 +7,7 @@
 //
 // This file contains the posix specific functions
 //
-#include "compiler/osinclude.h"
+#include "osinclude.h"
 
 #if !defined(ANGLE_OS_POSIX)
 #error Trying to build a posix specific file in a non-posix build.