[PATCH] sign-file: fix build error in sign-file.c with libressl

[John Crispin]

From: Felix Fietkau <nbd@xxxxxxxx>

The sign-file tool failed to build against libressl. Fix this by extending
the PKCS7 check and thus making sign-file link against libressl without an
error.

Signed-off-by: John Crispin <john@xxxxxxxxxxx>
Signed-off-by: Felix Fietkau <nbd@xxxxxxxx>
---
 scripts/sign-file.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/scripts/sign-file.c b/scripts/sign-file.c
index 53af6dc..7307fd4 100755
--- a/scripts/sign-file.c
+++ b/scripts/sign-file.c
@@ -41,7 +41,9 @@
  * signing with anything other than SHA1 - so we're stuck with that if such is
  * the case.
  */
-#if OPENSSL_VERSION_NUMBER < 0x10000000L || defined(OPENSSL_NO_CMS)
+#if defined(LIBRESSL_VERSION_NUMBER) || \
+	OPENSSL_VERSION_NUMBER < 0x10000000L || \
+	defined(OPENSSL_NO_CMS)
 #define USE_PKCS7
 #endif
 #ifndef USE_PKCS7
-- 
1.7.10.4