Disable AppVeyor Cygwin64 testing

Until ocaml/flexdll#52 is resolved,
Cygwin64 is essentially a broken platform for OCaml.

Author: dra27

appveyor.yml

@@ -14,9 +14,9 @@ environment:
   matrix:
     - CYG_ROOT: cygwin
       CYG_ARCH: x86
-    - CYG_ROOT: cygwin64
-      CYG_ARCH: x86_64
-      DEP_MODE: lib-pkg
+#    - CYG_ROOT: cygwin64
+#      CYG_ARCH: x86_64
+#      DEP_MODE: lib-pkg
     - OCAML_PORT: msvc
       DEP_MODE: lib-pkg
     - OCAML_PORT: msvc64

appveyor_build.cmd

@@ -116,10 +116,6 @@ if %ERRORLEVEL% equ 1 (
 if not exist bootstrap\nul (
   "%CYG_ROOT%\bin\bash.exe" -lc "cd $APPVEYOR_BUILD_FOLDER && make compiler" || exit /b 1
   for /f "delims=" %%U in ('type bootstrap\installed-tarball') do echo %%U %DEP_MODE%> bootstrap\installed-tarball
-  if "%CYG_ARCH%%OCAML_PORT%" equ "x86_64" (
-    "%CYG_ROOT%\bin\bash.exe" -lc "cd $APPVEYOR_BUILD_FOLDER && rebase -b 0x7cd20000 bootstrap/ocaml/lib/ocaml/stublibs/dllunix.so" || exit /b 1
-    "%CYG_ROOT%\bin\bash.exe" -lc "cd $APPVEYOR_BUILD_FOLDER && rebase -b 0x7cd20000 bootstrap/ocaml/lib/ocaml/stublibs/dllthreads.so" || exit /b 1
-  )
   if exist bootstrap\ocaml-*.tar.gz del bootstrap\ocaml-*.tar.gz
   if "%OCAML_PORT%" neq "" if exist bootstrap\flexdll-*.tar.gz del bootstrap\flexdll-*.tar.gz
   del bootstrap\ocaml\bin\*.byte.exe