[libwbxml2] Update to 0.11.6. Contributes to JB#25872

Now using git submodule for source code.

Updates to the latest upstream version which supports the
WBXML_INSTALL_FULL_HEADERS flag to expose the internal API headers, and
adds this flag to the build specification.

The headers are needed to allow direct access to the WBXML tree.

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "upstream"]
+	path = upstream
+	url = https://github.com/libwbxml/libwbxml.git

rpm/libwbxml2.spec

@@ -1,5 +1,5 @@
 Name:    libwbxml2
-Version: 0.10.8
+Version: 0.11.6
 Release: 1
 Summary: Library to parse, encode and handle WBXML documents
 Group:   System/Libraries
@@ -16,12 +16,6 @@ tools to Parse, Encode and Handle WBXML documents.  The WBXML format
 is a binary representation of XML, defined by the Wap Forum, and used
 to reduce bandwidth in mobile communications.
 
-%files
-%defattr(-,root,root,-)
-%license COPYING GNU-LGPL
-%{_bindir}/*
-%{_libdir}/*.so.*
-
 %package devel
 Summary: Development files for %{name}
 Group: Development/Libraries
@@ -30,12 +24,6 @@ Requires: %{name} = %{version}-%{release}
 %description devel
 %{summary}.
 
-%files devel
-%defattr(-,root,root,-)
-%{_includedir}/*
-%{_libdir}/*.so
-%{_libdir}/pkgconfig/*.pc
-
 %package doc
 Summary:   Documentation for %{name}
 Group:     Documentation
@@ -44,17 +32,13 @@ Requires:  %{name} = %{version}-%{release}
 %description doc
 %{summary}.
 
-%files doc
-%defattr(-,root,root,-)
-%{_docdir}/%{name}-%{version}
-
 %prep
-%setup -q -n %{name}-%{version}
+%setup -q -n %{name}-%{version}/upstream
 
 %build
 mkdir build
 cd build
-cmake -DCMAKE_INSTALL_PREFIX=/usr ..
+cmake -DCMAKE_INSTALL_PREFIX=/usr -DWBXML_INSTALL_FULL_HEADERS=ON ..
 make
 
 %install
@@ -67,3 +51,20 @@ mv %{buildroot}%{_docdir}/* %{buildroot}%{_docdir}/%{name}-%{version}
 
 %post -p /sbin/ldconfig
 %postun -p /sbin/ldconfig
+
+%files
+%defattr(-,root,root,-)
+%license COPYING GNU-LGPL
+%{_bindir}/*
+%{_libdir}/*.so.*
+
+%files devel
+%defattr(-,root,root,-)
+%{_includedir}/*
+%{_libdir}/*.so
+%{_libdir}/pkgconfig/*.pc
+%{_datadir}/cmake/Modules/FindLibWbxml2.cmake
+
+%files doc
+%defattr(-,root,root,-)
+%{_docdir}/%{name}-%{version}