[Resend PATCH] tools/usb: fix a makefile bug

[Du, ChangbinX]

I try to compile tools/usb foler, but got below error(gcc version
4.6.3):
	tools/usb/testusb.c:516: undefined reference to `pthread_create'
	tools/usb/testusb.c:541: undefined reference to `pthread_join'
The reason is the makefile puts source files behind of compiler option
"-l". For gcc(and clang), it reads compiler options in order from left
to right. When compiler gets a source file, it starts parsing it and try
to resolve all symbols invoked. If compiler can not resolve a symbol, it
will read --remain-- options and try get a definition of the symbol. So,
if we put source file behind of "-l" option, the specified library will
not work.

Signed-off-by: Du Changbin <changbinx.du@xxxxxxxxx>
---
 tools/usb/Makefile |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/usb/Makefile b/tools/usb/Makefile
index 396d6c4..e1cfd19 100644
--- a/tools/usb/Makefile
+++ b/tools/usb/Makefile
@@ -7,7 +7,7 @@ CFLAGS = $(WARNINGS) -g $(PTHREAD_LIBS) -I../include
 
 all: testusb ffs-test
 %: %.c
-	$(CC) $(CFLAGS) -o $@ $^
+	$(CC) $^ $(CFLAGS) -o $@
 
 clean:
 	$(RM) testusb ffs-test
-- 
1.7.9.5

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