Fix tests Makefile.am: WIN_LIBS must be defined before COMMON_LIBS

tests/Makefile.am

@@ -75,9 +75,6 @@ ETCP_FULL_OBJS = \
 	$(top_builddir)/src/utun-utun_instance.o \
 	$(ETCP_CORE_OBJS)
 
-# Common libraries (libuasync.a from lib directory)
-COMMON_LIBS = $(top_builddir)/lib/libuasync.a -lpthread $(WIN_LIBS)
-
 # Windows-specific libraries (advapi32 for CryptGenRandom, ws2_32 for sockets)
 if OS_WINDOWS
 WIN_LIBS = -lws2_32 -liphlpapi -ladvapi32
@@ -85,6 +82,9 @@ else
 WIN_LIBS =
 endif
 
+# Common libraries (libuasync.a from lib directory)
+COMMON_LIBS = $(top_builddir)/lib/libuasync.a -lpthread $(WIN_LIBS)
+
 # Crypto libraries (conditional)
 if USE_OPENSSL
 CRYPTO_LIBS = -lcrypto