binman: Fix a test-coverage regression

Unfortunately a recent patch snuck through without the require test
coverage. Fix it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Fixes: 571bc4e67d3 ("binman: Support positioning an entry by and ELF symbol")
diff --git a/tools/binman/test/embed_data.c b/tools/binman/test/embed_data.c
index 47d8c38..08b68c5 100644
--- a/tools/binman/test/embed_data.c
+++ b/tools/binman/test/embed_data.c
@@ -7,6 +7,7 @@
  */
 
 int first[10] = {1};
+int before[2] __attribute__((section(".embed"))) = {2, 3};
 int embed[3] __attribute__((section(".embed"))) = {0x1234, 0x5678};
 int second[10] = {1};