Build xerces with CMake + restore dependency of linphone on libxsd.

builders/linphone.cmake

@@ -27,7 +27,7 @@ lcb_external_source_paths("linphone")
 lcb_groupable(YES)
 lcb_package_source(YES)
 
-lcb_dependencies("bctoolbox" "bellesip" "ortp" "ms2" "soci")
+lcb_dependencies("bctoolbox" "bellesip" "ortp" "ms2" "libxsd" "soci")
 if(LINPHONE_BUILDER_BUILD_DEPENDENCIES AND NOT APPLE)
 	# Do not build sqlite3, xml2 and zlib on Apple systems (Mac OS X and iOS), they are provided by the system
 	lcb_dependencies("sqlite3" "xml2")

builders/xerces.cmake

@@ -23,11 +23,4 @@
 lcb_git_repository("git://git.linphone.org/xerces-c.git")
 lcb_external_source_paths("externals/xerces-c")
 lcb_may_be_found_on_system(YES)
-lcb_build_method("autotools")
-lcb_configure_options(
-	"--disable-threads"
-	"--disable-network"
-)
-lcb_linking_type("--disable-static" "--enable-shared")
-lcb_cross_compilation_options("--prefix=${CMAKE_INSTALL_PREFIX}")