swupdate: fix multilib build

Install paths are hard-coded into SWUpdate. Pass the install path for
libraries to be compliant with Multilib build.
Signed-off-by: Stefano Babic <sbabic@denx.de>

recipes-support/swupdate/swupdate.inc

@@ -70,7 +70,7 @@ RDEPENDS_${PN}-tools += "${PN}-client ${PN}-progress ${PN}-tools-hawkbit \
 
 S = "${WORKDIR}/git/"
 
-EXTRA_OEMAKE += " HOSTCC="${BUILD_CC}" HOSTCXX="${BUILD_CXX}" LD="${CC}" DESTDIR="${D}" V=1 ARCH=${TARGET_ARCH} CROSS_COMPILE=${TARGET_PREFIX} SKIP_STRIP=y"
+EXTRA_OEMAKE += " HOSTCC="${BUILD_CC}" HOSTCXX="${BUILD_CXX}" LD="${CC}" DESTDIR="${D}" LIBDIR="${libdir}" V=1 ARCH=${TARGET_ARCH} CROSS_COMPILE=${TARGET_PREFIX} SKIP_STRIP=y"
 
 DEPENDS += "kern-tools-native"