Remove spurious reference to radars in code (we try not to put Radar numbers into the sources.)
[lld][ELF] Change the order of the writable note section

Writable note sections if they exist should not appear before text
they belong in the data segment
Remove some unused #includes.
Remove an unused ivar.
Remove a spurious comment.
msbuild: Add clang's compiler-rt libs to the LibraryPath

This allows linking libraries like the asan RTL.
For "expected unqualified-id" errors after a double colon, and the double colon
is at the end of the line, point to the location after the double colon instead
of at the next token.  There is more context to be given this way.  In addition,
the next token can be several lines later.
sanitizers: Make sure Visual Studio gets error reports

Visual Studio appears to close stderr before launching a non-console
win32 program.  This means we don't see any sanitizer reports.  If
stderr printing fails, call OutputDebugStringA to get the reports into
the Visual Studio debugger console.