kernel-devsrc: fix usrmerge install path

Update /lib to $nonarch_base_libdir to fix package QA errors when usermerge is enabled in DISTRO_FEATURES.

ERROR: kernel-devsrc-1.0-r0 do_package_qa: QA Issue: kernel-devsrc package is not obeying usrmerge distro feature. /lib should be relocated to /usr. [usrmerge]

---
 meta/recipes-kernel/linux/kernel-devsrc.bb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

index 361ad21e1f..87347fa969 100644
@@ -32,7 +32,7 @@ B = "${STAGING_KERNEL_BUILDDIR}"
 
 PACKAGE_ARCH = "${MACHINE_ARCH}"
 
-KERNEL_BUILD_ROOT="/lib/modules/"
+KERNEL_BUILD_ROOT="${nonarch_base_libdir}/modules/"
 
 do_install() {
     kerneldir=${D}${KERNEL_BUILD_ROOT}${KERNEL_VERSION}

2.20.0