[powerpc,powerpcspe,ppc64] linux-config: Eliminate config.*_bootwrapper.gz files

On powerpc architectures that may use a bootwrapper, we create a
temporary build_<arch>_<featureset>_<flavour>_bootwrapper directory
for each kernel configuration to hold the related tools which we won't
install for real (because they are always native).

This directory is then matched by the wildcard used in building
linux-config, causing linux-config packages to contain spurious
(empty) kconfig files based on these directories in addition to the
real kconfig files.

Rename the temporary directory to avoid matching that wildcard.

debian/changelog

@@ -9,6 +9,8 @@ linux (4.19.12-2) UNRELEASED; urgency=medium
   * linux-image-*-unsigned: Remove Provides field (Closes: #916927)
   * [ia64,m68k] libbpf: Don't build on architectures without performance events
   * [riscv64] tools/include/.../bitsperlong.h: Add support for riscv
+  * [powerpc,powerpcspe,ppc64] linux-config: Eliminate config.*_bootwrapper.gz
+    files
 
  -- Uwe Kleine-König <ukleinek@debian.org>  Sun, 23 Dec 2018 17:28:52 +0100
 

debian/rules.real

@@ -479,12 +479,12 @@ ifneq ($(filter powerpc powerpcspe ppc64,$(ARCH)),)
 # the executables it calls.  Kbuild will always build these executable
 # as native code, which is wrong for a cross-built package.  Install
 # symlinks to the versions in the linux-bootwrapper package instead.
-	rm -rf '$(DIR)_bootwrapper'
+	rm -rf '$(BUILD_DIR)/bootwrapper_$(ARCH)_$(FEATURESET)_$(FLAVOUR)'
 	+$(MAKE_CLEAN) -C '$(DIR)' bootwrapper_install \
 		WRAPPER_OBJDIR='$(CURDIR)/$(DT_INSTALL_DIR)' \
 		WRAPPER_DTSDIR='$(CURDIR)/$(DT_INSTALL_DIR)/dts' \
-		WRAPPER_BINDIR='$(CURDIR)/$(DIR)_bootwrapper'
-	for prog in '$(DIR)_bootwrapper'/*; do \
+		WRAPPER_BINDIR='$(CURDIR)/$(BUILD_DIR)/bootwrapper_$(ARCH)_$(FEATURESET)_$(FLAVOUR)'
+	for prog in '$(BUILD_DIR)/bootwrapper_$(ARCH)_$(FEATURESET)_$(FLAVOUR)'/*; do \
 		prog="$$(basename $$prog)"; \
 		ln -s ../linux-bootwrapper-$(ABINAME)/$$prog \
 			'$(DT_INSTALL_DIR)'/$$prog; \