Build win64 without notify
Build without flags / bump AM version
Add build cygwin arch's
Add option NOSYSROOTLT for building where there is a non sysroot libtool
Add ADDCXXFLAG option for CXX only flags
Ignore static stdc++ lib check / options
Allow option to build with mingw when building for cygwin (USEMINGW)
Dont sync the GCC lib dir to build root
Expand win32/win64 chain components