It's not CygWin but Cygwin

Change-Id: I1f1e9fa67244645f695885fcb7b877b9a1ecdf4f
diff --git a/configure.ac b/configure.ac
index 85d2395..6fc1487 100644
--- a/configure.ac
+++ b/configure.ac
@@ -7248,7 +7248,7 @@ if test "$with_export_validation" = yes; then
            fi
        fi
        if test "$build_os" = "cygwin"; then
            # In case of CygWin it will be executed from Windows,
            # In case of Cygwin it will be executed from Windows,
            # so we need to run bash and absolute path to validator
            # so instead of "odfvalidator" it will be
            # something like "bash.exe C:\cygwin\opt\lo\bin\odfvalidator"
@@ -7281,7 +7281,7 @@ if test "$with_export_validation" = yes; then
            fi
        fi
        if test "$build_os" = "cygwin"; then
            # In case of CygWin it will be executed from Windows,
            # In case of Cygwin it will be executed from Windows,
            # so we need to run bash and absolute path to validator
            # so instead of "odfvalidator" it will be
            # something like "bash.exe C:\cygwin\opt\lo\bin\odfvalidator"
@@ -7316,7 +7316,7 @@ if test "$with_bffvalidator" != "no"; then
            AC_MSG_ERROR([bffvalidator not found, but required by --with-bffvalidator])
        fi
    elif test -n "$BFFVALIDATOR"; then
        # We are not in CygWin but need to run Windows binary with wine
        # We are not in Cygwin but need to run Windows binary with wine
        AC_PATH_PROGS(WINE, wine)

        # so swap in a shell wrapper that converts paths transparently