Actions:
Remove call_sys_cmd() definition from misc_os_dependent.h b/c its unused
Remove get_thread_string_id() declaration from misc_os_dependent.h b/c its unused
Remove misc_os_dependent.cpp file b/c the only definition was get_thread_string_id()
Remove file reference to misc_os_dependent.cpp from epee/src/CMakeLists.txt b/c its now deleted
Add readline, ldns, graphviz, unbound to depends packages
Add a cmake toolchain file to depends that is uniquely created for every build and placed in triple/share/toolchain.cmake
This file is then passed to cmake with -DCMAKE_TOOLCHAIN_FILE=/path/to/triple/share/toolchain.cmake
Add the boost locale package to depends
In the depends cmake toolchain file, a DEPENDS flag is added
to exclude, or change cmake checks done that are required for depends
Link miniupnpc and unwind from depends and not external
Add libiconv and icu4c to depends, required for mingw32 builds.
Headers (winsock) need to be lower case in order to compile on unix systems.
This should not affect building on windows.
Nanosecond timer precision won't work on Windows, but we don't
care since I'm using that just for profiling incremental code
paths, but a Windows coder is welcome to add it if there's a way.
