support/test-pkg: move minimal.config into a separate file

This minimal configuration is also very useful outside test-pkg. In
addition, it will simplify the config merge in a later patch.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Cc: Yann E. MORIN <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

support/config-fragments/minimal.config

@@ -0,0 +1,6 @@
+# This config fragment disables Buildroot options that are turned on by
+# default, in order to arrive at minimal build time.
+BR2_INIT_NONE=y
+BR2_SYSTEM_BIN_SH_NONE=y
+# BR2_PACKAGE_BUSYBOX is not set
+# BR2_TARGET_ROOTFS_TAR is not set

utils/test-pkg

@@ -100,13 +100,7 @@ build_one() {
         return 2
     fi
 
-    cat >>"${dir}/.config" <<-_EOF_
-	BR2_INIT_NONE=y
-	BR2_SYSTEM_BIN_SH_NONE=y
-	# BR2_PACKAGE_BUSYBOX is not set
-	# BR2_TARGET_ROOTFS_TAR is not set
-	_EOF_
-    cat "${cfg}" >>"${dir}/.config"
+    cat "support/config-fragments/minimal.config" "${cfg}" >>"${dir}/.config"
 
     if ! make O="${dir}" olddefconfig > "${dir}/logfile" 2>&1; then
         return 2