Ensure that all entries in .sln files are sorted.
Ensure that all entries in .sln files are sorted.

Previously this the NestedProjects section was sorted
according to dictionary key ordering which resulted
in differing sln files between gyp runs.

BUG=http://code.google.com/p/gyp/issues/detail?id=296

Review URL: https://chromiumcodereview.appspot.com/10943017

git-svn-id: e7e1075985beda50ea81ac4472467b4f6e91fc78@1503 78cadc50-ecff-11dd-a971-7dbc132099af

cysp/gyp,sloanyang/gyp,saghul/gyn,luvit/gyp,svn2github/gyp,mapbox/gyp,svn2github/gyp,mkrautz/gyp-libmumble,sloanyang/gyp,pyokagan/gyp,enkripsi/gyp,sanyaade-teachings/gyp,ttyangf/pdfium_gyp,channing/gyp,bnoordhuis/gyp,tarc/gyp,trafi/gyp,mapbox/gyp,lukeweber/gyp-override,bulldy80/gyp_unofficial,bnq4ever/gypgoogle,cysp/gyp,svn2github/gyp,cysp/gyp,AWhetter/gyp,tarc/gyp,AWhetter/gyp,sanyaade-teachings/gyp,yinquan529/platform-external-chromium_org-tools-gyp,adblockplus/gyp,azunite/gyp_20150930,azunite/gyp,Phuehvk/gyp,bnoordhuis/gyp,xin3liang/platform_external_chromium_org_tools_gyp,lukeweber/gyp-override,dougbeal/gyp,cchamberlain/gyp,omasanori/gyp,duanhjlt/gyp,pyokagan/gyp,openpeer/webrtc-gyp,erikge/watch_gyp,saghul/gyn,mistydemeo/gyp,ttyangf/pdfium_gyp,ttyangf/pdfium_gyp,okwasi/gyp,Phuehvk/gyp,carlTLR/gyp,enkripsi/gyp,LazyCodingCat/gyp,IllusionRom-deprecated/android_platform_external_chromium_org_tools_gyp,mumble-voip/libmumble-gyp,lukeweber/gyp-override,ryfx/gyp,mapbox/gyp,AWhetter/gyp,okwasi/gyp,Danath/gyp,sdklite/gyp,yjhjstz/gyp,bnq4ever/gypgoogle,Omegaphora/external_chromium_org_tools_gyp,azunite/gyp_20150930,cchamberlain/gyp,bnq4ever/gypgoogle,alexcrichton/gyp,springmeyer/gyp,msc-/gyp,sloanyang/gyp,erikge/watch_gyp,pandaxcl/gyp,ttyangf/gyp,pandaxcl/gyp,LazyCodingCat/gyp,msc-/gyp,brson/gyp,kevinchen3315/gyp-git,duanhjlt/gyp,MIPS/external-chromium_org-tools-gyp,chromium/gyp,dougbeal/gyp,bulldy80/gyp_unofficial,bulldy80/gyp_unofficial,mumble-voip/libmumble-gyp,okumura/gyp,bpsinc-native/src_tools_gyp,azunite/gyp_20150930,xin3liang/platform_external_chromium_org_tools_gyp,enkripsi/gyp,MIPS/external-chromium_org-tools-gyp,brson/gyp,mkrautz/gyp-libmumble,omasanori/gyp,channing/gyp,LazyCodingCat/gyp,mapbox/gyp,clar/gyp,svn2github/kgyp,bnq4ever/gypgoogle,pyokagan/gyp,duanhjlt/gyp,msc-/gyp,cchamberlain/gyp,yinquan529/platform-external-chromium_org-tools-gyp,adblockplus/gyp,mgamer/gyp,Chilledheart/gyp,MIPS/external-chromium_org-tools-gyp,ttyangf/gyp,dougbeal/gyp,chromium/gyp,kevinchen3315/gyp-git,sdklite/gyp,mumble-voip/libmumble-gyp,kevinchen3315/gyp-git,amoikevin/gyp,Omegaphora/external_chromium_org_tools_gyp,ryfx/gyp,android-ia/platform_external_chromium_org_tools_gyp,azunite/gyp,saghul/gyn,bulldy80/gyp_unofficial,sloanyang/gyp,IllusionRom-deprecated/android_platform_external_chromium_org_tools_gyp,erikge/watch_gyp,MIPS/external-chromium_org-tools-gyp,azunite/gyp_20150930,luvit/gyp,AOSPU/external_chromium_org_tools_gyp,svn2github/kgyp,AWhetter/gyp,trafi/gyp,Jack-Q/GYP-copy,geekboxzone/lollipop_external_chromium_org_tools_gyp,geekboxzone/lollipop_external_chromium_org_tools_gyp,Omegaphora/external_chromium_org_tools_gyp,cysp/gyp,clar/gyp,pandaxcl/gyp,ttyangf/pdfium_gyp,sport-monkey/GYP,luvit/gyp,openpeer/webrtc-gyp,LazyCodingCat/gyp,Danath/gyp,trafi/gyp,yangrongwei/gyp,springmeyer/gyp,omasanori/gyp,sdklite/gyp,mistydemeo/gyp,turbulenz/gyp,erikge/watch_gyp,yinquan529/platform-external-chromium_org-tools-gyp,ttyangf/gyp,okumura/gyp,luvit/gyp,mistydemeo/gyp,brson/gyp,mkrautz/gyp-libmumble,chromium/gyp,mapbox/gyp,Jack-Q/GYP-copy,mgamer/gyp,bdarnell/gyp,mgamer/gyp,dougbeal/gyp,tarc/gyp,yangrongwei/gyp,lukeweber/gyp-override,mistydemeo/gyp,bdarnell/gyp,turbulenz/gyp,Jack-Q/GYP-copy,svn2github/gyp,pyokagan/gyp,alexcrichton/gyp,bpsinc-native/src_tools_gyp,trafi/gyp,svn2github/kgyp,android-ia/platform_external_chromium_org_tools_gyp,sport-monkey/GYP,Chilledheart/gyp,Danath/gyp,xin3liang/platform_external_chromium_org_tools_gyp,mgamer/gyp,bulldy80/gyp_unofficial,AOSPU/external_chromium_org_tools_gyp,pandaxcl/gyp,Phuehvk/gyp,openpeer/webrtc-gyp,yjhjstz/gyp,Danath/gyp,channing/gyp,adblockplus/gyp,amoikevin/gyp,Omegaphora/external_chromium_org_tools_gyp,xin3liang/platform_external_chromium_org_tools_gyp,openpeer/webrtc-gyp,bpsinc-native/src_tools_gyp,Jack-Q/GYP-copy,turbulenz/gyp,mkrautz/gyp-libmumble,tarc/gyp,sdklite/gyp,IllusionRom-deprecated/android_platform_external_chromium_org_tools_gyp,bdarnell/gyp,yangrongwei/gyp,Jack-Q/GYP-copy,enkripsi/gyp,mumble-voip/libmumble-gyp,ttyangf/pdfium_gyp,yjhjstz/gyp,svn2github/kgyp,sdklite/gyp,ryfx/gyp,erikge/watch_gyp,alexcrichton/gyp,sanyaade-teachings/gyp,sport-monkey/GYP,carlTLR/gyp,bdarnell/gyp,amoikevin/gyp,duanhjlt/gyp,clar/gyp,saghul/gyn,azunite/gyp,cysp/gyp,trafi/gyp,okumura/gyp,azunite/gyp,springmeyer/gyp,LazyCodingCat/gyp,chromium/gyp,clar/gyp,sport-monkey/GYP,turbulenz/gyp,sanyaade-teachings/gyp,carlTLR/gyp,bpsinc-native/src_tools_gyp,pandaxcl/gyp,azunite/gyp_20150930,bnoordhuis/gyp,chromium/gyp,AOSPU/external_chromium_org_tools_gyp,yjhjstz/gyp,cchamberlain/gyp,turbulenz/gyp,IllusionRom-deprecated/android_platform_external_chromium_org_tools_gyp,svn2github/gyp,msc-/gyp,kevinchen3315/gyp-git,bnoordhuis/gyp,Chilledheart/gyp,adblockplus/gyp,alexcrichton/gyp,omasanori/gyp,azunite/gyp,okwasi/gyp,yjhjstz/gyp,cchamberlain/gyp,saghul/gyn,ryfx/gyp,enkripsi/gyp,okwasi/gyp,AWhetter/gyp,tarc/gyp,brson/gyp,okumura/gyp,Chilledheart/gyp,yangrongwei/gyp,springmeyer/gyp,dougbeal/gyp,ttyangf/gyp,amoikevin/gyp,bnq4ever/gypgoogle,carlTLR/gyp,Phuehvk/gyp,springmeyer/gyp,msc-/gyp,Chilledheart/gyp,amoikevin/gyp,sanyaade-teachings/gyp,ttyangf/gyp,mgamer/gyp,clar/gyp,carlTLR/gyp,openpeer/webrtc-gyp,adblockplus/gyp,android-ia/platform_external_chromium_org_tools_gyp,channing/gyp,pyokagan/gyp,yinquan529/platform-external-chromium_org-tools-gyp,geekboxzone/lollipop_external_chromium_org_tools_gyp,geekboxzone/lollipop_external_chromium_org_tools_gyp,ryfx/gyp,Danath/gyp,AOSPU/external_chromium_org_tools_gyp,bnoordhuis/gyp,duanhjlt/gyp,svn2github/kgyp,sport-monkey/GYP,android-ia/platform_external_chromium_org_tools_gyp,Phuehvk/gyp