Creating release candidate rc4 from release_370 branch

llvm-svn: 246120
llvm-svn: 246119
llvm-svn: 246118
llvm-svn: 246117
llvm-svn: 246116
llvm-svn: 246115
llvm-svn: 246114
llvm-svn: 246113
llvm-svn: 246112
llvm-svn: 246110
llvm-svn: 246109
ReleaseNotes: fix some indentation

llvm-svn: 246108
1 file changed