package/boost: stop on the first error during install to staging

-q option is missing in BOOST_INSTALL_STAGING_CMDS,
so the build doesn't stop on the first error.
This help to see what happened.

Signed-off-by: Romain Naour <romain.naour@openwide.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/boost/boost.mk

@@ -148,7 +148,7 @@ define HOST_BOOST_INSTALL_CMDS
 endef
 
 define BOOST_INSTALL_STAGING_CMDS
-	(cd $(@D) && ./bjam -j$(PARALLEL_JOBS) -d+1 \
+	(cd $(@D) && ./bjam -j$(PARALLEL_JOBS) -q -d+1 \
 	--user-config=$(@D)/user-config.jam \
 	$(BOOST_OPTS) \
 	--prefix=$(STAGING_DIR)/usr \