vboot_reference/cgpt_nor: Make ForkExecL() static local

BUG=none
TEST=builds

Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Change-Id: Ied809d3c2839f33d738d1938cafd6c634d54ee28
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/3353558
Commit-Queue: Edward O'Callaghan <quasisec@chromium.org>
Tested-by: Edward O'Callaghan <quasisec@chromium.org>
Auto-Submit: Edward O'Callaghan <quasisec@chromium.org>
Reviewed-by: Nikolai Artemiev <nartemiev@google.com>
Commit-Queue: Nikolai Artemiev <nartemiev@google.com>
diff --git a/cgpt/cgpt_nor.c b/cgpt/cgpt_nor.c
index 2e43918..4450adb 100644
--- a/cgpt/cgpt_nor.c
+++ b/cgpt/cgpt_nor.c
@@ -70,7 +70,7 @@
   return status;
 }
 
-int ForkExecL(const char *cwd, const char *cmd, ...) {
+static int ForkExecL(const char *cwd, const char *cmd, ...) {
   int argc;
   va_list ap;
   va_start(ap, cmd);