Add 'set -o pipefail' in front of find pipelines to catch regressions like #703800

svn path=/dists/sid/linux/; revision=19944

debian/rules.real

@@ -198,6 +198,7 @@ install-doc: $(STAMPS_DIR)/build-doc
 	mkdir -p $(OUT_DIR)
 	cp -a CREDITS MAINTAINERS README REPORTING-BUGS Documentation $(OUT_DIR)
 	rm -rf $(OUT_DIR)/Documentation/DocBook
+	set -o pipefail; \
 	cd $(DIR)/Documentation/DocBook; \
 	find * -name '*.html' -print \
 	| \
@@ -210,6 +211,7 @@ install-manual: DIR=$(BUILD_DIR)/build-doc
 install-manual: DH_OPTIONS = -p$(PACKAGE_NAME)
 install-manual: $(STAMPS_DIR)/build-doc
 	dh_prep
+	set -o pipefail; \
 	find $(DIR)/Documentation/DocBook/man/ -name '*.9' | xargs dh_installman
 	+$(MAKE_SELF) install-base GENCONTROL_ARGS='$(call DEFINE_MULTIARCH,foreign)'
 
@@ -231,6 +233,7 @@ install-headers_$(ARCH)_$(FEATURESET): $(STAMPS_DIR)/source_$(FEATURESET)
 	dh_testroot
 	dh_prep
 
+	set -o pipefail; \
 	cd $(SOURCE_DIR); \
 	( \
 	  echo Makefile; \
@@ -362,6 +365,7 @@ ifeq ($(MODULES),True)
 	chmod a+x $(CURDIR)/debian/bin/no-depmod
 	+$(MAKE_CLEAN) -C $(DIR) modules_install DEPMOD='$(CURDIR)/debian/bin/no-depmod' INSTALL_MOD_PATH='$(CURDIR)'/$(PACKAGE_DIR) INSTALL_MOD_STRIP=1
 ifeq ($(DEBUG),True)
+	set -o pipefail; \
 	find $(PACKAGE_DIR) -name '*.ko' | sed 's|$(PACKAGE_DIR)/lib/modules/$(REAL_VERSION)/kernel/||' | while read module ; do \
 	  objcopy --add-gnu-debuglink=$(DIR)/$$module $(PACKAGE_DIR)/lib/modules/$(REAL_VERSION)/kernel/$$module || exit; \
 	done