libselinux: add patch to fix Blackfin build issue

Do not make symbols hidden on Blackfin

The libselinux logic to hide internal symbols from the DSO doesn't

work properly on Blackfin due to the USER_LABEL_PREFIX not being

handled properly. A real fix is not that simple, so this patch simply

disables the internal symbol hiding mechanism. This means that those

symbols are visible in the final DSO, which is not a problem for

proper execution, it just isn't as clean.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

Index: b/src/dso.h

===================================================================

--- a/src/dso.h

+++ b/src/dso.h

@@ -1,7 +1,7 @@

 #ifndef _SELINUX_DSO_H

 #define _SELINUX_DSO_H	1

-#ifdef SHARED

+#if defined(SHARED) && !defined(__bfin__)

 # define hidden __attribute__ ((visibility ("hidden")))

 # define hidden_proto(fct) __hidden_proto (fct, fct##_internal)

 # define __hidden_proto(fct, internal)	\