UBUNTU: SAUCE: tools -- add ability to disable libbfd

We do not want to be linked to libbfd as this is a tightly versioned
package which does not maintain its ABI.  This prevents us from have
multiple tools packages installed.  Turn that off and we will fallback
to libiberty.

BugLink: http://bugs.launchpad.net/bugs/1748922Signed-off-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
(backported from commit 1db74df61ab4fdef7e6c7734caca0639d2278689 bionic)
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Khalid Elmously <khalid.elmously@canonical.com>
Acked-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

tools/perf/config/Makefile

@@ -515,6 +515,10 @@ else
   endif
 endif
 
+ifdef HAVE_NO_LIBBFD
+  feature-libbfd := 0
+endif
+
 ifeq ($(feature-libbfd), 1)
   EXTLIBS += -lbfd