Fixed gl_PointCoord Y coordinate.

I forgot to flip (or rather unflip) the Y coord in r536. Tested particle system sample and ran conformance tests. All conformance tests passed.

Review URL: http://codereview.appspot.com/4093043

git-svn-id: https://angleproject.googlecode.com/svn/trunk@537 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/src/libGLESv2/Program.cpp b/src/libGLESv2/Program.cpp
index 63d8f83..9855cdc 100644
--- a/src/libGLESv2/Program.cpp
+++ b/src/libGLESv2/Program.cpp
@@ -1415,7 +1415,7 @@
 
     if (mFragmentShader->mUsesPointCoord && sm3)
     {
-        mPixelHLSL += "    gl_PointCoord = float2(input.gl_PointCoord.x, 1.0 - input.gl_PointCoord.y);\n";
+        mPixelHLSL += "    gl_PointCoord = input.gl_PointCoord;\n";
     }
 
     if (mFragmentShader->mUsesFrontFacing)