enable --disable-dependency-tracking on CYGWIN also

it also takes an inordinate amount of time there.

Author: jeremyd2019

build-mingw-w64.sh

@@ -75,7 +75,7 @@ if command -v gmake >/dev/null; then
 fi
 
 case $(uname) in
-MINGW*|MSYS*)
+MINGW*|MSYS*|CYGWIN*)
     CRT_CONFIG_FLAGS="--disable-dependency-tracking"
     ;;
 esac