Build with the bundled xdiff

Unfortunately, building against the system libxdiff doesn't work at the
moment, because libxdiff got updated but libgit2 hasn't been ported yet.

While we're waiting for the bundling issue to be fixed upstream, let's
build against the bundled copy for now.

libgit2.spec

@@ -9,19 +9,17 @@ License: GPLv2 with exceptions
 URL: http://libgit2.github.com/
 Source0: https://github.com/%{name}/%{name}/archive/%{commit}/%{name}-%{version}.tar.gz
 
-# Use system libxdiff
-Patch0: libgit2-0.20.0-system-libxdiff.patch
-
 # Add htonl() and friends declarations on non-x86 arches
 Patch1: libgit2-0.19.0-non-x86.patch
 
 BuildRequires: cmake >= 2.6
 BuildRequires: http-parser-devel
-BuildRequires: libxdiff-devel
 BuildRequires: openssl-devel
 BuildRequires: python
 BuildRequires: zlib-devel
 
+Provides: bundled(libxdiff)
+
 %description
 libgit2 is a portable, pure C implementation of the Git core methods 
 provided as a re-entrant linkable library with a solid API, allowing
@@ -44,7 +42,6 @@ developing applications that use %{name}.
 find examples -name ".gitignore" -delete
 
 # Apply patches
-%patch0 -p1 -b .system-libxdiff
 %patch1 -p1 -b .non-x86
 
 # Fix pkgconfig generation
@@ -55,7 +52,6 @@ sed -i 's/ionline/xonline/' CMakeLists.txt
 
 # Remove bundled libraries
 rm -rf deps
-rm -rf src/xdiff
 
 
 %build
@@ -88,6 +84,8 @@ make install DESTDIR=%{buildroot}
 
 
 %changelog
+- Build with the bundled xdiff.
+
 * Sun Nov 24 2013 Ignacio Casal Quinteiro <icq@gnome.org> - 0.20.0-1
 - 0.20.0