[appveyor] rewrite mirrorlist after updating runtime

If pacman was updated on runtime update, changes which we domne earlier will be rewrited by config from package

appveyor.yml

@@ -30,13 +30,16 @@ install:
 - c:\msys64\usr\bin\bash -lc "echo 'Server = https://mirror.yandex.ru/mirrors/msys2/mingw/x86_64/' > /etc/pacman.d/mirrorlist.mingw64"
 - c:\msys64\usr\bin\bash -lc "echo 'Server = https://mirror.yandex.ru/mirrors/msys2/mingw/i686/' > /etc/pacman.d/mirrorlist.mingw32"
 - c:\msys64\usr\bin\bash -lc "echo 'Server = https://mirror.yandex.ru/mirrors/msys2/msys/$arch/' > /etc/pacman.d/mirrorlist.msys"
-- c:\msys64\usr\bin\bash -lc "cat /etc/pacman.d/mirrorlist.*"
 # remove packages which can break build
 - c:\msys64\usr\bin\bash -lc "pacman --noconfirm -Rns gcc-fortran gcc mingw-w64-{i686,x86_64}-gcc-ada mingw-w64-{i686,x86_64}-gcc-objc"
 # update runtime
 - c:\msys64\usr\bin\bash -lc "pacman --noconfirm -Syuu"
 # Kill bash before next try
 - taskkill /T /F /IM bash.exe /IM gpg.exe /IM gpg-agent.exe | exit /B 0
+# rewrite mirrorlist again because pacman update can rewrite it
+- c:\msys64\usr\bin\bash -lc "echo 'Server = https://mirror.yandex.ru/mirrors/msys2/mingw/x86_64/' > /etc/pacman.d/mirrorlist.mingw64"
+- c:\msys64\usr\bin\bash -lc "echo 'Server = https://mirror.yandex.ru/mirrors/msys2/mingw/i686/' > /etc/pacman.d/mirrorlist.mingw32"
+- c:\msys64\usr\bin\bash -lc "echo 'Server = https://mirror.yandex.ru/mirrors/msys2/msys/$arch/' > /etc/pacman.d/mirrorlist.msys"
 # update packages and install required
 - c:\msys64\usr\bin\bash -lc "pacman --noconfirm -Syuu ${MSYS_PACKAGES}"