Update FBO completeness checks for depth textures
Update FBO completeness checks for depth textures

Trac #20875
Signed-off-by: Nicolas Capens

- improve missing attachment logic to allow no color attachments
- disallow depth texture color attachments
- allow texture depth and stencil attachments
- update simulaneous depth/stencil logic

git-svn-id: a070b70d2b8c44c266a3870c0cddd9a0ee470458@1113 736b8ea6-26fd-11df-bfd4-992fa37f6226

mlfarrell/angle,xin3liang/platform_external_chromium_org_third_party_angle,mrobinson/rust-angle,MIPS/external-chromium_org-third_party-angle,csa7mdm/angle,pombreda/angleproject,KTXSoftware/angleproject,android-ia/platform_external_chromium_org_third_party_angle,MSOpenTech/angle,ppy/angle,larsbergstrom/angle,xin3liang/platform_external_chromium_org_third_party_angle_dx11,KTXSoftware/angleproject,android-ia/platform_external_chromium_org_third_party_angle_dx11,geekboxzone/lollipop_external_chromium_org_third_party_angle,crezefire/angle,crezefire/angle,larsbergstrom/angle,themusicgod1/angleproject,ecoal95/angle,ehsan/angle,mrobinson/rust-angle,xin3liang/platform_external_chromium_org_third_party_angle,mybios/angle,ehsan/angle,vvuk/angle,mikolalysenko/angle,xuxiandi/angleproject,ecoal95/angle,stammen/angleproject,RepublicMaster/angleproject,mlfarrell/angle,nandhanurrevanth/angle,cvsuser-chromium/chromium-third-party_angle_dx11,cantren/angleproject,cvsuser-chromium/chromium-third-party_angle_dx11,cantren/angleproject,domokit/waterfall,ehsan/angle,csa7mdm/angle,geekboxzone/lollipop_external_chromium_org_third_party_angle,geekboxzone/lollipop_external_chromium_org_third_party_angle,KalebDark/angleproject,pombreda/angleproject,xin3liang/platform_external_chromium_org_third_party_angle,cvsuser-chromium/chromium-third-party_angle_dx11,android-ia/platform_external_chromium_org_third_party_angle_dx11,vvuk/angle,cvsuser-chromium/chromium-third-party_angle_dx11,mybios/angle,mikolalysenko/angle,vvuk/angle-old,MIPS/external-chromium_org-third_party-angle_dx11,KTXSoftware/angleproject,xin3liang/platform_external_chromium_org_third_party_angle_dx11,MSOpenTech/angle-win8.0,ecoal95/angle,RepublicMaster/angleproject,KTXSoftware/angleproject,android-ia/platform_external_chromium_org_third_party_angle,mlfarrell/angle,ghostoy/angle,MIPS/external-chromium_org-third_party-angle_dx11,jgcaaprom/android_external_chromium_org_third_party_angle,csa7mdm/angle,csa7mdm/angle,KalebDark/angleproject,android-ia/platform_external_chromium_org_third_party_angle_dx11,larsbergstrom/angle,MIPS/external-chromium_org-third_party-angle_dx11,domokit/waterfall,MSOpenTech/angle-win8.0,jgcaaprom/android_external_chromium_org_third_party_angle,xuxiandi/angleproject,KalebDark/angleproject,mybios/angle,mikolalysenko/angle,vvuk/angle,ecoal95/angle,crezefire/angle,pombreda/angleproject,xin3liang/platform_external_chromium_org_third_party_angle,MSOpenTech/angle,cantren/angleproject,shairai/angleproject,xuxiandi/angleproject,KalebDark/angleproject,ppy/angle,MSOpenTech/angle,xin3liang/platform_external_chromium_org_third_party_angle_dx11,vvuk/angle,mrobinson/rust-angle,mrobinson/rust-angle,larsbergstrom/angle,bsergean/angle,android-ia/platform_external_chromium_org_third_party_angle,MIPS/external-chromium_org-third_party-angle,xuxiandi/angleproject,MIPS/external-chromium_org-third_party-angle_dx11,ecoal95/angle,jgcaaprom/android_external_chromium_org_third_party_angle,vvuk/angle-old,ppy/angle,nandhanurrevanth/angle,shairai/angleproject,MSOpenTech/angle-win8.0,themusicgod1/angleproject,cantren/angleproject,MIPS/external-chromium_org-third_party-angle,ghostoy/angle,bsergean/angle,bsergean/angle,mikolalysenko/angle,RepublicMaster/angleproject,shairai/angleproject,stammen/angleproject,KTXSoftware/angleproject,shairai/angleproject,mlfarrell/angle,nandhanurrevanth/angle,android-ia/platform_external_chromium_org_third_party_angle,bsergean/angle,ghostoy/angle,themusicgod1/angleproject,pombreda/angleproject,geekboxzone/lollipop_external_chromium_org_third_party_angle,ehsan/angle,vvuk/angle-old,ghostoy/angle,themusicgod1/angleproject,nandhanurrevanth/angle,android-ia/platform_external_chromium_org_third_party_angle_dx11,mrobinson/rust-angle,ppy/angle,MIPS/external-chromium_org-third_party-angle,stammen/angleproject,MSOpenTech/angle,crezefire/angle,RepublicMaster/angleproject,vvuk/angle-old,MSOpenTech/angle-win8.0,jgcaaprom/android_external_chromium_org_third_party_angle,xin3liang/platform_external_chromium_org_third_party_angle_dx11,mybios/angle,stammen/angleproject