Disable lto optimization

Disable lto optimization to workaround build failures on tests. This
failures are not seeing in Debian since this tests are not built.

As reference, the error triggered is

  undefined reference to `aa_query_label'

Signed-off-by: Walter Lozano <walter.lozano@collabora.com>

debian/rules

@@ -2,7 +2,7 @@
 
 include /usr/share/dpkg/pkg-info.mk
 
-export DEB_BUILD_MAINT_OPTIONS = hardening=+bindnow optimize=+lto
+export DEB_BUILD_MAINT_OPTIONS = hardening=+bindnow
 
 export DEB_HOST_ARCH_OS   ?= $(shell dpkg-architecture -qDEB_HOST_ARCH_OS)