Add 8.4.4 to the Windows-friendly make script

appveyor.yml

@@ -1,6 +1,7 @@
 version: 1.0.{build}
 environment:
   matrix:
+  - GHCVER: 8.4.4
   - GHCVER: 8.4.3
   - GHCVER: 8.4.2
   - GHCVER: 8.2.2

make-build-all.bat

@@ -17,6 +17,7 @@ CALL :hie-8.2.1
 CALL :hie-8.2.2
 CALL :hie-8.4.2
 CALL :hie-8.4.3
+CALL :hie-8.4.4
 EXIT /B
 
 :hie-8.2.1
@@ -49,6 +50,13 @@ COPY "%STACKLOCALBINDIR%\hie.exe" "%STACKLOCALBINDIR%\hie-8.4.3.exe"
 COPY "%STACKLOCALBINDIR%\hie-8.4.3.exe" "%STACKLOCALBINDIR%\hie-8.4.exe"
 EXIT /B
 
+:hie-8.4.4
+CALL :submodules
+stack --stack-yaml=stack-8.4.4.yaml install
+COPY "%STACKLOCALBINDIR%\hie.exe" "%STACKLOCALBINDIR%\hie-8.4.4.exe"
+COPY "%STACKLOCALBINDIR%\hie-8.4.4.exe" "%STACKLOCALBINDIR%\hie-8.4.exe"
+EXIT /B
+
 :submodules
 git submodule update --init
 EXIT /B
@@ -58,4 +66,5 @@ stack --stack-yaml=stack-8.2.1.yaml exec hoogle generate
 stack --stack-yaml=stack-8.2.2.yaml exec hoogle generate
 stack --stack-yaml=stack-8.4.2.yaml exec hoogle generate
 stack --stack-yaml=stack-8.4.3.yaml exec hoogle generate
+stack --stack-yaml=stack-8.4.4.yaml exec hoogle generate
 EXIT /B