Report missing type definition dependency only once per type.
Error reporting improvements
Fix reported warning location
Add new test
Fix arguments location
[sgen] Fix 64-bit bug occurring when LOS object crosses cardtable overlap boundary.
[sgen] Use unified cardtable-update code in M&S, too.

The bug where objects crossed the cardtable overlap boundary cannot
happen with M&S because blocks are naturally aligned.  It can't hurt
to use the same code for updating them, too, though.
Merge remote-tracking branch 'origin/fix-los-cardtable-overlap'
[Mono.Debugger.Soft] Make CommandException public
rx: Add -d:HAS_AWAIT options to 4.5 and 2.1 builds.
Redirect more duplicate security types to Mono.Security
[xbuild]: Support <PropertyGroup/ItemGroup> inside <Target>.
Fix support for custom attribute classes in CustomAttributeDataMirror which indirectly inherit from Attribute. Fixes #11564.
Fix the windows build.
Implement the calculation of stack bounds on windows. Fixes #11624.
Implement partial generic methods
NaCl runtime fixes

- fix compile/runtime issues caused by upstream changes
- add NaCl glibc support
- various changes to support running tests in NaCl glibc
  from 'make check'
NaCl ARM work, first pass
[Socket] Specify 'timeout' in the exception msg of Receive(buf)

In the same way the overload Receive (buf, flags) already does, mention
"time out" in the exception message when the socketError is WOULDBLOCK and
the socket is not non-blocking (otherwise it would throw with the reason
"Operation on non-blocking socket would block", which doesn't make sense
for a socket that is not non-blocking).
[Socket] Refactor Socket to make Receive(_) call Receive(_,_)

After previous commit, two Receive() overloads are basically the same, so
we can remove some duplicated code here by making one call the other one.