Add in 'ldso' to directory list since 'make clean' was not recursing

into it.

test/Makefile

@@ -22,7 +22,7 @@ TOPDIR=../
 .EXPORT_ALL_VARIABLES:
 
 
-ALL_SUBDIRS = args assert ctype pwd_grp signal silly stdlib string unistd crypt #misc
+ALL_SUBDIRS = args assert ctype ldso pwd_grp signal silly stdlib string unistd crypt #misc
 DIRS = $(ALL_SUBDIRS)
 #ifeq ($(TARGET_ARCH), $(NATIVE_ARCH))
 #	DIRS = $(ALL_SUBDIRS)