Fix libGL compilation (missing spaces)

Change-Id: Ic1748fefb6778a4eeab8a41f81803586025a60ee
Signed-off-by: Michele Bissacco <mirh@protonmail.ch>
Reviewed-on: https://swiftshader-review.googlesource.com/5740
Tested-by: Nicolas Capens <capn@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

src/OpenGL/libGL/libGL.cpp

diff --git a/src/OpenGL/libGL/libGL.cpp b/src/OpenGL/libGL/libGL.cpp
index 8c0d760..171e520 100644
--- a/src/OpenGL/libGL/libGL.cpp
+++ b/src/OpenGL/libGL/libGL.cpp
@@ -3044,9 +3044,9 @@
 	case GL_RENDERER:
 		return (GLubyte*)"SwiftShader";
 	case GL_VERSION:
-		return (GLubyte*)"2.1 SwiftShader "VERSION_STRING;
+		return (GLubyte*)"2.1 SwiftShader " VERSION_STRING;
 	case GL_SHADING_LANGUAGE_VERSION:
-		return (GLubyte*)"3.30 SwiftShader "VERSION_STRING;
+		return (GLubyte*)"3.30 SwiftShader " VERSION_STRING;
 	case GL_EXTENSIONS:
 		// Keep list sorted in following order:
 		// OES extensions