boost: Ensure we use our user-config.jam file

This change ensures we use the user-config.jam Configuration
that we created and will not use anything from the user's home
directory.

[YOCTO #2302]

(From OE-Core rev: f246e467b8513f1c1c33b5e7462ae6478754d531)

Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-support/boost/boost.inc

@@ -16,7 +16,7 @@ BOOST_VER = "${@"_".join(d.getVar("PV",1).split("."))}"
 BOOST_MAJ = "${@"_".join(d.getVar("PV",1).split(".")[0:2])}"
 BOOST_P = "boost_${BOOST_VER}"
 
-INC_PR = "r2"
+INC_PR = "r3"
 
 SRC_URI = "${SOURCEFORGE_MIRROR}/${BPN}/${BOOST_P}.tar.bz2"
 
@@ -127,6 +127,7 @@ BJAM_TOOLS   = "-sTOOLS=gcc \
 		"
 
 BJAM_OPTS    = '${BJAM_TOOLS} \
+                -sBOOST_BUILD_USER_CONFIG=${S}/tools/build/v2/user-config.jam \
 		--builddir=${S}/${TARGET_SYS} \
                 --disable-icu \
 		${BJAM_EXTRA}'