libroot: move catopen/catgets/catclose out of libbe

src/kits/locale/Jamfile

@@ -6,7 +6,6 @@ UsePrivateHeaders locale shared ;
 UsePublicHeaders locale storage ;
 
 local sources =
-	cat.cpp
 	Catalog.cpp
 	CatalogData.cpp
 	Collator.cpp

src/system/libroot/posix/Jamfile

@@ -27,6 +27,7 @@ for architectureObject in [ MultiArchSubDirSetup ] {
 
 		MergeObject <$(architecture)>posix_main.o :
 			assert.cpp
+			cat.cpp
 			dlfcn.c
 			dirent.c
 			errno.c