tools: cmake: fix compatibility with LibreSSL as well

Sadly, LibreSSL claims to be OpenSSL v2.0.0 while not providing the new
interfaces introduced with OpenSSL v1.1.x, so extend the pre-OpenSSL 1.1.x
compat checks to consider LibreSSL as well.

Signed-off-by: Jo-Philipp Wich <[email protected]>

tools/cmake/patches/150-libarchive-fix-libressl-compat.patch

@@ -0,0 +1,22 @@
+--- a/Utilities/cmlibarchive/libarchive/archive_openssl_evp_private.h
++++ b/Utilities/cmlibarchive/libarchive/archive_openssl_evp_private.h
+@@ -28,7 +28,7 @@
+ #include <openssl/evp.h>
+ #include <openssl/opensslv.h>
+ 
+-#if OPENSSL_VERSION_NUMBER < 0x10100000L
++#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
+ #include <stdlib.h> /* malloc, free */
+ #include <string.h> /* memset */
+ static inline EVP_MD_CTX *EVP_MD_CTX_new(void)
+--- a/Utilities/cmlibarchive/libarchive/archive_openssl_hmac_private.h
++++ b/Utilities/cmlibarchive/libarchive/archive_openssl_hmac_private.h
+@@ -28,7 +28,7 @@
+ #include <openssl/hmac.h>
+ #include <openssl/opensslv.h>
+ 
+-#if OPENSSL_VERSION_NUMBER < 0x10100000L
++#if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
+ #include <stdlib.h> /* malloc, free */
+ #include <string.h> /* memset */
+ static inline HMAC_CTX *HMAC_CTX_new(void)