Fix typo ("x86_64" -> "X86_64")

...introduced with 2d2294fb82bd4f0d1d805405631aeb1acbc36cbb "Add x64 Windows
here, too".  As reported by Richard Webb at
<https://lists.freedesktop.org/archives/libreoffice/2018-March/079870.html>
"Re: Manifest.xml for 64bit LO".

Change-Id: I1681908012e73e520bebd79b8149788358ea49a3
Reviewed-on: https://gerrit.libreoffice.org/51946
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
(cherry picked from commit 045e2755163042c3c0bc83595b1c73104cb76721)
Reviewed-on: https://gerrit.libreoffice.org/51950
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>
diff --git a/desktop/source/deployment/misc/dp_platform.cxx b/desktop/source/deployment/misc/dp_platform.cxx
index f888c6d..74d80e9 100644
--- a/desktop/source/deployment/misc/dp_platform.cxx
+++ b/desktop/source/deployment/misc/dp_platform.cxx
@@ -77,7 +77,7 @@ namespace
        else if (token == "windows_x86")
            ret = checkOSandCPU("Windows", "x86");
        else if (token == "windows_x86_64")
            ret = checkOSandCPU("Windows", "x86_64");
            ret = checkOSandCPU("Windows", "X86_64");
        else if (token == "solaris_sparc")
            ret = checkOSandCPU("Solaris", "SPARC");
        else if (token == "solaris_sparc64")