version up : pkg-config 0.29

also add --disable-host-tool option to prevent possible installation
error that happens when pkg-config is rebuild without removing
parts/pkg-config directory.

component/pkgconfig/buildout.cfg

@@ -14,8 +14,8 @@ extends =
 
 [pkgconfig]
 recipe = slapos.recipe.cmmi
-url = http://pkgconfig.freedesktop.org/releases/pkg-config-0.28.tar.gz
-md5sum = aa3c86e67551adc3ac865160e34a2a0d
+url = http://pkgconfig.freedesktop.org/releases/pkg-config-0.29.tar.gz
+md5sum = 77f27dce7ef88d0634d0d6f90e03a77f
 location = ${buildout:parts-directory}/${:_buildout_section_name_}
 # build pkg-config twice so that second configure can use pkg-config
 # to compute GLIB_CFLAGS and GLIB_LIBS.
@@ -25,6 +25,7 @@ configure-options =
   --prefix=${:location}
   --with-installed-glib
   --with-installed-popt
+  --disable-host-tool
 environment =
   PATH=.:%(PATH)s
   PKG_CONFIG_PATH=${glib:location}/lib/pkgconfig