Fixed gl_PointCoord Y coordinate.
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: 947ae547afacb859f3991e003b9d6feb04be57d7@537 736b8ea6-26fd-11df-bfd4-992fa37f6226

Mustaavalkosta/android_external_angle,dumganhar/angleproject,adobe/angle.js,Mustaavalkosta/android_external_angle,android-ia/platform_external_chromium_org_third_party_angle,Mustaavalkosta/android_external_angle,jgcaaprom/android_external_chromium_org_third_party_angle,dumganhar/angleproject,spurious/angle-mirror,android-ia/platform_external_chromium_org_third_party_angle,jgcaaprom/android_external_chromium_org_third_party_angle,xin3liang/platform_external_chromium_org_third_party_angle,MIPS/external-chromium_org-third_party-angle,xin3liang/platform_external_chromium_org_third_party_angle,android-ia/platform_external_chromium_org_third_party_angle,android-ia/platform_external_chromium_org_third_party_angle,adobe/angle.js,Mustaavalkosta/android_external_angle,dumganhar/angleproject,spurious/angle-mirror,geekboxzone/lollipop_external_chromium_org_third_party_angle,geekboxzone/lollipop_external_chromium_org_third_party_angle,geekboxzone/lollipop_external_chromium_org_third_party_angle,jgcaaprom/android_external_chromium_org_third_party_angle,MIPS/external-chromium_org-third_party-angle,adobe/angle.js,dumganhar/angleproject,spurious/angle-mirror,xin3liang/platform_external_chromium_org_third_party_angle,MIPS/external-chromium_org-third_party-angle,jgcaaprom/android_external_chromium_org_third_party_angle,geekboxzone/lollipop_external_chromium_org_third_party_angle,MIPS/external-chromium_org-third_party-angle,spurious/angle-mirror,xin3liang/platform_external_chromium_org_third_party_angle,adobe/angle.js