UBUNTU: [Packaging] avoid arch-specific certificate creation

Currently, the debian/canonical-(revoked-)certs.pem files are generated
by the clean target and included in the source package.

These files are created by concatenating *-all.pem and *-$(arch).pem
files.

When creating a source package, $(arch) expands to the architecture of
the build machine.

Although it is unclear whether arch-specific certificates have ever
been used, if they were, canonical-(revoked-)certs.pem would become
architecture-specific, resulting in an architecture-dependent source
package.

The source package should be consistent, regardless of the architecture
of the build machine.

This commit changes the build rules to concatenate all *.pem files,
ensuring the output is independent of the build machine architecture.

Signed-off-by: Masahiro Yamada <masahiro.yamada@canonical.com>
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>

Author: masahir0y

debian/rules

@@ -213,7 +213,7 @@ $(DEBIAN)/control.stub: 				\
 debian/control: $(DEBIAN)/control.stub
 	cp $(DEBIAN)/control.stub debian/control
 
-debian/canonical-certs.pem: $(wildcard debian/certs/*-all.pem) $(wildcard debian/certs/*-$(arch).pem) $(wildcard $(DEBIAN)/certs/*-all.pem) $(wildcard $(DEBIAN)/certs/*-$(arch).pem)
+debian/canonical-certs.pem: $(wildcard debian/certs/*.pem $(DEBIAN)/certs/*.pem)
 	for cert in $(sort $(notdir $^));					\
 	do									\
 		for dir in $(DEBIAN) debian;					\
@@ -225,7 +225,7 @@ debian/canonical-certs.pem: $(wildcard debian/certs/*-all.pem) $(wildcard debian
 		done;								\
 	done >"$@"
 
-debian/canonical-revoked-certs.pem: $(wildcard debian/revoked-certs/*-all.pem) $(wildcard debian/revoked-certs/*-$(arch).pem) $(wildcard $(DEBIAN)/revoked-certs/*-all.pem) $(wildcard $(DEBIAN)/revoked-certs/*-$(arch).pem)
+debian/canonical-revoked-certs.pem: $(wildcard debian/revoked-certs/*.pem $(DEBIAN)/revoked-certs/*.pem)
 	for cert in $(sort $(notdir $^));					\
 	do									\
 		for dir in $(DEBIAN) debian;					\