The toolchain-scripts class was changed to assign to the variable using ??=
which allows users to override it. We therefore need to _append instead
of += to have the change take effect as intended.
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
REAL_MULTIMACH_TARGET_SYS = "${TUNE_PKGARCH}${TARGET_VENDOR}-${TARGET_OS}"
inherit toolchain-scripts
-TOOLCHAIN_NEED_CONFIGSITE_CACHE += "zlib"
+TOOLCHAIN_NEED_CONFIGSITE_CACHE_append = " zlib"
SDK_DIR = "${WORKDIR}/sdk"
SDK_OUTPUT = "${SDK_DIR}/image"