pjproject_bundled: Use the asterisk github mirror for download

We now mirror the pjproject tarball and md5 at
https://github.com/asterisk/third-party/tree/master/pjproject

To improve download reliability, we now get the tarball from
our mirror instead of from pjsip.org.

ASTERISK-27052 #close
Reported-by: 'alex'

Change-Id: I60236587a8935bfa71fcc391f4e2ecb31918c08a

third-party/pjproject/Makefile

@@ -97,7 +97,7 @@ endef
 define download_from_pjproject
 	($(SHELL_ECHO_PREFIX) Downloading $(TARBALL_URL) to $(TARBALL) ;\
 	$(DOWNLOAD_TO_STDOUT) $(call DOWNLOAD_TIMEOUT,5,60) $(TARBALL_URL) > $(TARBALL) &&\
-	$(SHELL_ECHO_PREFIX) Downloading $(PJPROJECT_URL)/MD5SUM to $(PJMD5SUM) &&\
+	$(SHELL_ECHO_PREFIX) Downloading $(PJPROJECT_URL)/MD5SUM.TXT to $(PJMD5SUM) &&\
 	$(DOWNLOAD_TO_STDOUT) $(call DOWNLOAD_TIMEOUT,5,60) $(PJPROJECT_URL)/MD5SUM.TXT > $(PJMD5SUM) &&\
 	$(verify_tarball))
 endef

third-party/pjproject/Makefile.rules

-PJPROJECT_URL = http://www.pjsip.org/release/$(PJPROJECT_VERSION)
+PJPROJECT_URL ?= https://raw.githubusercontent.com/asterisk/third-party/master/pjproject/$(PJPROJECT_VERSION)
 
 # Even though we're not installing pjproject, we're setting prefix to /opt/pjproject to be safe