gpg4libre: enable gpgme support for Windows and OSX

Change-Id: Ifa266e1c18a8a09cd5c815adc70d0236e00f72b5
Reviewed-on: https://gerrit.libreoffice.org/45092Reviewed-by: Siegmund Gorr <siegmund.gorr@cib.de>
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>
Tested-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>

xmlsecurity/Library_xsec_xmlsec.mk

@@ -58,7 +58,7 @@ $(eval $(call gb_Library_use_externals,xsec_xmlsec,\
 	libxml2 \
 	xmlsec \
 ))
-ifneq ($(filter-out WNT MACOSX ANDROID IOS,$(OS)),)
+ifneq ($(filter-out ANDROID IOS,$(OS)),)
 $(eval $(call gb_Library_use_externals,xsec_xmlsec,\
 	gpgmepp \
 ))
@@ -81,7 +81,7 @@ $(eval $(call gb_Library_add_exception_objects,xsec_xmlsec,\
 	xmlsecurity/source/xmlsec/nss/xsec_nss \
 ))
 
-ifneq ($(filter-out WNT MACOSX ANDROID IOS,$(OS)),)
+ifneq ($(filter-out ANDROID IOS,$(OS)),)
 $(eval $(call gb_Library_add_exception_objects,xsec_xmlsec,\
 	xmlsecurity/source/gpg/CertificateImpl \
 	xmlsecurity/source/gpg/CipherContext \