package/ca-certificates: don't hash certificates.crt

c_rehash looks at all files in /etc/ssl/certs, generates the hash for
the certificates in them, and makes a symlink from the hash to the
certificate file.

However, ca-certificates.crt is also installed in /etc/ssl/certs and
it contains all the certificates. c_rehash will take one of them (the
first?) and create a symlink from that hash to ca-certificates.crt.
Usually, this results in an error like:

WARNING: Skipping duplicate certificate ca-certificates.crt

and all is well. However, depending on filesystem order,
ca-certificates.crt may come first, and the actual certificate is
not symlinked.

To fix this install certificates.crt to /etc/ssl/certs *after* we run
c_rehash to prevent it getting hashed by mistake.

Note: $(TARGET_DIR)/etc/ssl/certs/ is already removed during install so
this fix also works for rebuilds.

Signed-off-by: Martin Bark <martin@barkynet.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
(cherry picked from commit d07ddd8e4ed576dbce4c33ab006f342e24d3bd6b)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/ca-certificates/ca-certificates.mk

@@ -33,11 +33,15 @@ define CA_CERTIFICATES_INSTALL_TARGET_CMDS
 	cd $(TARGET_DIR) ;\
 	for i in `find usr/share/ca-certificates -name "*.crt"` ; do \
 		ln -sf ../../../$$i etc/ssl/certs/`basename $${i} .crt`.pem ;\
-		cat $$i >>etc/ssl/certs/ca-certificates.crt ;\
-	done
+		cat $$i ;\
+	done >$(@D)/ca-certificates.crt
 
 	# Create symlinks to the certificates by their hash values
 	$(HOST_DIR)/bin/c_rehash $(TARGET_DIR)/etc/ssl/certs
+
+	# Install the certificates bundle
+	$(INSTALL) -D -m 644 $(@D)/ca-certificates.crt \
+		$(TARGET_DIR)/etc/ssl/certs/ca-certificates.crt
 endef
 
 $(eval $(generic-package))