RFR: JDK-8251516 VSCode IDE configuration specifies c++03

Thu Aug 13 10:38:34 UTC 2020

 From the bug report:

make/ide/vscode/hotspot/indexers/cpptools-settings.txt: 
  "C_Cpp.default.cppStandard": "c++03",
make/ide/vscode/hotspot/indexers/rtags-settings.txt: 
  "C_Cpp.default.cppStandard": "c++03",
make/ide/vscode/hotspot/indexers/ccls-settings.txt: 
  "C_Cpp.default.cppStandard": "c++03",
make/ide/vscode/hotspot/indexers/clangd-settings.txt: 
  "C_Cpp.default.cppStandard": "c++03",

Those should probably be c++14 now.

Bug: https://bugs.openjdk.java.net/browse/JDK-8251516
WebRev: 
http://cr.openjdk.java.net/~ihse/JDK-8251516-fix-vscode-ide-gen-for-c++14/webrev.01

/Magnus