obs: Follow up change on slapos.git

obs/slapos-node/slapos/buildout.cfg.in

@@ -26,6 +26,7 @@ environment +=
 # Add gettext library path to RPATH as its binaries are used to build
 # glib for example
 environment =
+  PATH=${perl:location}/bin:${xz-utils:location}/bin:%(PATH)s
   CPPFLAGS=-I${libxml2:location}/include -I${zlib:location}/include -I${ncurses:location}/include
   LDFLAGS=-L${libxml2:location}/lib -Wl,-rpath=${libxml2:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib -L${ncurses:location}/lib -Wl,-rpath=${ncurses:location}/lib -Wl,-rpath=%BUILD_DIRECTORY%/parts/${:_buildout_section_name_}/lib