package/boost: bump to version 1.71.0

- Change BOOST_SITE to
  https://dl.bintray.com/boostorg/release/1.71.0/source to get latest
  boost version
- Update path of bjam

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/boost/boost.hash

@@ -1,5 +1,5 @@
-# From http://www.boost.org/users/history/version_1_70_0.html
-sha256 430ae8354789de4fd19ee52f3b1f739e1fba576f0aded0897c3c2bc00fb38778  boost_1_70_0.tar.bz2
+# From http://www.boost.org/users/history/version_1_71_0.html
+sha256 d73a8da01e8bf8c7eda40b4c84915071a8c8a0df4a6734537ddde4a8580524ee  boost_1_71_0.tar.bz2
 
 # Locally computed
 sha256 c9bff75738922193e67fa726fa225535870d2aa1059f91452c411736284ad566  LICENSE_1_0.txt

package/boost/boost.mk

@@ -4,9 +4,9 @@
 #
 ################################################################################
 
-BOOST_VERSION = 1.70.0
+BOOST_VERSION = 1.71.0
 BOOST_SOURCE = boost_$(subst .,_,$(BOOST_VERSION)).tar.bz2
-BOOST_SITE = http://downloads.sourceforge.net/project/boost/boost/$(BOOST_VERSION)
+BOOST_SITE = https://dl.bintray.com/boostorg/release/$(BOOST_VERSION)/source
 BOOST_INSTALL_STAGING = YES
 BOOST_LICENSE = BSL-1.0
 BOOST_LICENSE_FILES = LICENSE_1_0.txt
@@ -133,7 +133,7 @@ define BOOST_CONFIGURE_CMDS
 endef
 
 define BOOST_BUILD_CMDS
-	(cd $(@D) && $(TARGET_MAKE_ENV) ./bjam -j$(PARALLEL_JOBS) -q \
+	(cd $(@D) && $(TARGET_MAKE_ENV) ./tools/build/src/engine/bjam -j$(PARALLEL_JOBS) -q \
 	--user-config=$(@D)/user-config.jam \
 	$(BOOST_OPTS) \
 	--ignore-site-config \
@@ -150,7 +150,7 @@ define BOOST_INSTALL_TARGET_CMDS
 endef
 
 define BOOST_INSTALL_STAGING_CMDS
-	(cd $(@D) && $(TARGET_MAKE_ENV) ./bjam -j$(PARALLEL_JOBS) -q \
+	(cd $(@D) && $(TARGET_MAKE_ENV) ./tools/build/src/engine/bjam -j$(PARALLEL_JOBS) -q \
 	--user-config=$(@D)/user-config.jam \
 	$(BOOST_OPTS) \
 	--prefix=$(STAGING_DIR)/usr \