liblog: fix compile issue [1/1]

PD#SWPL-159633

Problem:
`File exists` error when the build task is rerun

Solution:
add `force` flag when do the symbolic link

Verify:
local

Change-Id: I5db26d928dc5a76fbd1b8236096d80e52b57f9d3
Signed-off-by: Jun Zhang <jun.zhang@amlogic.com>
diff --git a/liblog/Makefile b/liblog/Makefile
index 614cb08..aba1e99 100644
--- a/liblog/Makefile
+++ b/liblog/Makefile
@@ -22,10 +22,10 @@
 	$(CC) -fPIC -g -shared -Wl,-soname,${SONAME_TARGET} -o $(OUT_DIR)/$@ $^
 
 $(SONAME_TARGET): $(REAL_TARGET)
-	ln -s $^ $(OUT_DIR)/$@
+	ln -sf $^ $(OUT_DIR)/$@
 
 $(TARGET): $(SONAME_TARGET)
-	ln -s $^ $(OUT_DIR)/$@
+	ln -sf $^ $(OUT_DIR)/$@
 
 $(OUT_DIR)/%.o: %.c
 	$(CC) -c $(CFLAGS) $< -o $@