package/{libsepol,libselinux}: fix build on ancient distros

Ancient distros (especially enterprise-grade still in use) do not accept
ln --relative.

Revert the upstream commit, since the problem it was trying to fix is
not applicable in the context of Buildroot (even with a merged /usr).

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Adam Duskett <Aduskett@gmail.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libselinux/0003-revert-ln-relative.patch

@@ -0,0 +1,24 @@
+Makefile: revert libselinux: use ln --relative to create .so symlinks
+
+This reverts 71393a181d63c9baae5fe8dcaeb9411d1f253998
+
+ln --relative is too recent to be available in all distributions,
+especially enterprise-grade distros that can stick around as long as
+they are maintained (up to 10 years in some cases?).
+
+For the sake of Buildroot, revert the upstream patch.
+
+Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
+
+diff -durN a/src/Makefile b/src/Makefile
+--- a/src/Makefile
++++ b/src/Makefile
+@@ -151,7 +151,7 @@
+ 	install -m 755 $(LIBSO) $(SHLIBDIR)
+ 	test -d $(LIBDIR)/pkgconfig || install -m 755 -d $(LIBDIR)/pkgconfig
+ 	install -m 644 $(LIBPC) $(LIBDIR)/pkgconfig
+-	ln -sf --relative $(SHLIBDIR)/$(LIBSO) $(LIBDIR)/$(TARGET)
++	cd $(LIBDIR) && ln -sf ../../`basename $(SHLIBDIR)`/$(LIBSO) $(TARGET)
+ 
+ install-pywrap: pywrap
+ 	test -d $(PYLIBDIR)/site-packages/selinux || install -m 755 -d $(PYLIBDIR)/site-packages/selinux

package/libsepol/0004-revert-ln-relative.patch

@@ -0,0 +1,24 @@
+Makefile: revert libsepol: use ln --relative to create .so symlinks
+
+This reverts 71393a181d63c9baae5fe8dcaeb9411d1f253998
+
+ln --relative is too recent to be available in all distributions,
+especially enterprise-grade distros that can stick around as long as
+they are maintained (up to 10 years in some cases?).
+
+For the sake of Buildroot, revert the upstream patch.
+
+Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
+
+diff -durN a/src/Makefile b/src/Makefile
+--- a/src/Makefile
++++ b/src/Makefile
+@@ -77,7 +77,7 @@
+ ifeq ($(STATIC),)
+ 	test -d $(SHLIBDIR) || install -m 755 -d $(SHLIBDIR)
+ 	install -m 755 $(LIBSO) $(SHLIBDIR)
+-	ln -sf --relative $(SHLIBDIR)/$(LIBSO) $(LIBDIR)/$(TARGET)
++	cd $(LIBDIR) && ln -sf ../../`basename $(SHLIBDIR)`/$(LIBSO) $(TARGET)
+ endif
+ 
+ relabel: