Make package_repo buildable for the build host

src/tools/Jamfile

@@ -100,6 +100,7 @@ SubInclude HAIKU_TOP src tools locale ;
 SubInclude HAIKU_TOP src tools makebootable ;
 SubInclude HAIKU_TOP src tools opd_to_package_info ;
 SubInclude HAIKU_TOP src tools package ;
+SubInclude HAIKU_TOP src tools package_repo ;
 SubInclude HAIKU_TOP src tools rc ;
 SubInclude HAIKU_TOP src tools remote_disk_server ;
 SubInclude HAIKU_TOP src tools resattr ;

src/tools/package_repo/Jamfile

@@ -0,0 +1,16 @@
+SubDir HAIKU_TOP src tools package_repo ;
+
+SEARCH_SOURCE += [ FDirName $(HAIKU_TOP) src bin package_repo ] ;
+
+UsePrivateHeaders kernel shared ;
+
+USES_BE_API on <build>package_repo = true ;
+
+BuildPlatformMain <build>package_repo :
+	command_create.cpp
+	command_list.cpp
+	package_repo.cpp
+	:
+	libpackage_build.so $(HOST_LIBBE) $(HOST_LIBSUPC++)
+;
+