make-mod-scripts: change how some kernel module tools are built

Remove do_make_scripts() from module-base.bbclass and put
functionality in a recipe.  This will build the scripts only
once instead of each time an external module is built.

[YOCTO #12228]

(From OE-Core rev: ea12c46fe8748fb6606c603d463075a8624e6563)

Signed-off-by: Joe Slater <jslater@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-kernel/make-mod-scripts/make-mod-scripts_1.0.bb

@@ -0,0 +1,28 @@
+SUMMARY = "Build tools needed by external modules"
+LICENSE = "GPLv2"
+LIC_FILES_CHKSUM = "file://${COREBASE}/meta/files/common-licenses/GPL-2.0;md5=801f80980d171dd6425610833a22dbe6"
+
+inherit kernel-arch
+inherit pkgconfig
+
+PACKAGE_ARCH = "${MACHINE_ARCH}"
+
+S = "${WORKDIR}"
+
+do_configure[depends] += "virtual/kernel:do_shared_workdir"
+do_compile[depends] += "virtual/kernel:do_compile_kernelmodules"
+
+# Build some host tools under work-shared.  CC, LD, and AR are probably
+# not used, but this is the historical way of invoking "make scripts".
+#
+do_configure() {
+	unset CFLAGS CPPFLAGS CXXFLAGS LDFLAGS
+	make CC="${KERNEL_CC}" LD="${KERNEL_LD}" AR="${KERNEL_AR}" \
+	           -C ${STAGING_KERNEL_DIR} O=${STAGING_KERNEL_BUILDDIR} scripts
+}
+
+
+# There is no reason to build this on its own.
+#
+EXCLUDE_FROM_WORLD = "1"
+