base-files: return success on lib-copying with external toolchain when using an external toolchain the base-files package copies libc, libgcc and others from the library directory.

The file list is given as following in the .config:
CONFIG_LIBC_FILE_SPEC="./lib/ld{-*.so,-linux*.so.*} ./lib/lib{anl,c,cidn,crypt,dl,m,nsl,nss_dns,nss_files,resolv,util}{-*.so,.so.*}"

Because the filenames are composed with different endings, not all files exist
and will be skipped. Currently, this works only if the last composed file
(util.so.*) really exists. At the moment this works - but only if you don't add
a new file like 'uClibc'.

Adding it at the end '...resolv,util,uClibc}{-*.so,.so.*}' will lead to this
message, because the combination 'libuClibc.so.*' doesn't exist and Make will
evaluate the last copy statement of the for loop.

package/base-files/Makefile

@@ -487,10 +487,11 @@ ifeq ($(CONFIG_EXTERNAL_TOOLCHAIN),)
 		$(TOOLCHAIN_DIR)/lib/ld-$(LIBC_SO_VERSION).so \
 		$(1)/lib/
 	for file in libanl libc libcidn libcrypt libdl libm $(use_libnsl) $(use_nsswitch) libresolv $(use_libutil); do \
-		$(CP) \
-			$(TOOLCHAIN_DIR)/lib/$$$$file.so.* \
-			$(TOOLCHAIN_DIR)/lib/$$$$file-$(LIBC_SO_VERSION).so \
-			$(1)/lib/; \
+		for file in $(TOOLCHAIN_DIR)/lib/$$$$file.so.* $(TOOLCHAIN_DIR)/lib/$$$$file-$(LIBC_SO_VERSION).so; do \
+			if [ -e "$$$$file" ]; then \
+				$(CP) $$$$file $(1)/lib/; \
+			fi; \
+		done; \ 
 	done
   endef
 
@@ -575,7 +576,8 @@ else
 		dir=`dirname $$$$file` ; \
 		$(INSTALL_DIR) $(1)/$$$$dir ; \
 		$(CP) $(call qstrip,$(CONFIG_LIBGCC_ROOT_DIR))/$$$$file $(1)/$$$$dir/ ; \
-	done
+	done ; \
+	exit 0
   endef
 
   define Package/libssp/install
@@ -583,7 +585,8 @@ else
 		dir=`dirname $$$$file` ; \
 		$(INSTALL_DIR) $(1)/$$$$dir ; \
 		$(CP) $(call qstrip,$(CONFIG_LIBSSP_ROOT_DIR))/$$$$file $(1)/$$$$dir/ ; \
-	done
+	done ; \
+	exit 0
   endef
 
   define Package/libstdcpp/install
@@ -591,7 +594,8 @@ else
 		dir=`dirname $$$$file` ; \
 		$(INSTALL_DIR) $(1)/$$$$dir ; \
 		$(CP) $(call qstrip,$(CONFIG_LIBSTDCPP_ROOT_DIR))/$$$$file $(1)/$$$$dir/ ; \
-	done
+	done ; \
+	exit 0
   endef
 
   define Package/libc/install
@@ -599,7 +603,8 @@ else
 		dir=`dirname $$$$file` ; \
 		$(INSTALL_DIR) $(1)/$$$$dir ; \
 		$(CP) $(call qstrip,$(CONFIG_LIBC_ROOT_DIR))/$$$$file $(1)/$$$$dir/ ; \
-	done
+	done ; \
+	exit 0
   endef
 
   define Package/libpthread/install
@@ -607,7 +612,8 @@ else
 		dir=`dirname $$$$file` ; \
 		$(INSTALL_DIR) $(1)/$$$$dir ; \
 		$(CP) $(call qstrip,$(CONFIG_LIBPTHREAD_ROOT_DIR))/$$$$file $(1)/$$$$dir/ ; \
-	done
+	done ; \
+	exit 0
   endef
 
   define Package/librt/install
@@ -615,7 +621,8 @@ else
 		dir=`dirname $$$$file` ; \
 		$(INSTALL_DIR) $(1)/$$$$dir ; \
 		$(CP) $(call qstrip,$(CONFIG_LIBRT_ROOT_DIR))/$$$$file $(1)/$$$$dir/ ; \
-	done
+	done ; \
+	exit 0
   endef
 
   define Package/ldd/install
@@ -623,7 +630,8 @@ else
 		dir=`dirname $$$$file` ; \
 		$(INSTALL_DIR) $(1)/$$$$dir ; \
 		$(CP) $(call qstrip,$(CONFIG_LDD_ROOT_DIR))/$$$$file $(1)/$$$$dir/ ; \
-	done
+	done ; \
+	exit 0
   endef
 
   define Package/ldconfig/install
@@ -631,7 +639,8 @@ else
 		dir=`dirname $$$$file` ; \
 		$(INSTALL_DIR) $(1)/$$$$dir ; \
 		$(CP) $(call qstrip,$(CONFIG_LDCONFIG_ROOT_DIR))/$$$$file $(1)/$$$$dir/ ; \
-	done
+	done ; \
+	exit 0
   endef
 
 endif