Implement EGL_EXT_client_extensions

In EGLQueryString, it is now valid to query EGL_EXTENSIONS
with a display set to EGL_NO_DISPLAY, so the function
should proceed without returning an error in these cases.

Change-Id: I76ccd4f98f3d4180268b6b85b5b04a19bea59977
Reviewed-on: https://swiftshader-review.googlesource.com/9948
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>

src/OpenGL/libEGL/libEGL.cpp

diff --git a/src/OpenGL/libEGL/libEGL.cpp b/src/OpenGL/libEGL/libEGL.cpp
index 0d5f812..4451764 100644
--- a/src/OpenGL/libEGL/libEGL.cpp
+++ b/src/OpenGL/libEGL/libEGL.cpp
@@ -171,15 +171,16 @@
 {
 	TRACE("(EGLDisplay dpy = %p, EGLint name = %d)", dpy, name);
 
-	#if defined(__linux__) && !defined(__ANDROID__)
-		if(dpy == EGL_NO_DISPLAY && name == EGL_EXTENSIONS)
-		{
-			return success("EGL_KHR_platform_gbm "
-			               "EGL_KHR_platform_x11 "
-			               "EGL_EXT_client_extensions "
-			               "EGL_EXT_platform_base");
-		}
-	#endif
+	if(dpy == EGL_NO_DISPLAY && name == EGL_EXTENSIONS)

+	{

+		return success(

+#if defined(__linux__) && !defined(__ANDROID__)

+			"EGL_KHR_platform_gbm "

+			"EGL_KHR_platform_x11 "

+			"EGL_EXT_platform_base "

+#endif
+			"EGL_EXT_client_extensions");

+	}

 
 	egl::Display *display = egl::Display::get(dpy);