Add crypto_digest.[ch] to include.am

Included crypto_digest.[ch] into include.am in order to solve a compiling
issue. Also EOF line in crypto_digest.c added.

Follows #24658.

Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>

src/common/crypto_digest.c

@@ -660,3 +660,4 @@ crypto_xof_free_(crypto_xof_t *xof)
   memwipe(xof, 0, sizeof(crypto_xof_t));
   tor_free(xof);
 }
+

src/common/include.am

@@ -113,6 +113,7 @@ LIBOR_CRYPTO_A_SRC = \
   src/common/compress_zlib.c	\
   src/common/compress_zstd.c	\
   src/common/crypto.c		\
+  src/common/crypto_digest.c     \
   src/common/crypto_rsa.c     \
   src/common/crypto_openssl_mgt.c    \
   src/common/crypto_pwbox.c     \
@@ -163,6 +164,7 @@ COMMONHEADERS = \
   src/common/confline.h				\
   src/common/container.h			\
   src/common/crypto.h				\
+  src/common/crypto_digest.h            \
   src/common/crypto_curve25519.h		\
   src/common/crypto_ed25519.h			\
   src/common/crypto_format.h			\