Remove obsolete reference to ddk; Fixes for -Werror

Bug: 14416410

1. The new mingw-w64 toolchain x86_64-w64-mingw32-4.8 has ddk
   in x86_64-w64-mingw32/include/ddk
2. Add -Wno-error=cpp to suppress a warning that turns into error
   thanks to -Werror:

      Please include winsock2.h before windows.h
3. Cast GetLastError() return type DWORD to "int"
4. Include direct.h for _mkdir
5. Include stdint.h for uint8_t on Windows

Change-Id: I4bec0587f6573692f08c760da6c98ae551b8b5eb
diff --git a/adb/sysdeps.h b/adb/sysdeps.h
index ba4306f..ac9415c 100644
--- a/adb/sysdeps.h
+++ b/adb/sysdeps.h
@@ -35,6 +35,7 @@
 #include <sys/stat.h>
 #include <errno.h>
 #include <ctype.h>
+#include <direct.h>
 
 #define OS_PATH_SEPARATOR '\\'
 #define OS_PATH_SEPARATOR_STR "\\"