[SCM] libav/master: Merge remote-tracking branch 'origin/hardening'

[siretart at users.alioth.debian.org]

Set CPPFLAGS separately.
Filter out system-wide setting of -Bsymbolic-functions to avoid FTBFS.
Fix format string vulnerability detected by -Wformat-security.
Enable hardened build flags through dpkg-buildflags (Closes: #658929).
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X-Git-Refname: refs/heads/master
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X-Git-Oldrev: 186c6574446e1009f454df363247a34c00d8aa34
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The following commit has been merged in the master branch:
commit 3a7db6ce926957b972f2700272090ad413c30d85
Merge: 186c6574446e1009f454df363247a34c00d8aa34 de1d8cbc73b3fccfd8f8652af5ffe3fcc5a78376
Author: Reinhard Tartler <siretart at tauware.de>
Date:   Mon Mar 5 19:26:40 2012 +0100

    Merge remote-tracking branch 'origin/hardening'
    
    Conflicts:
    	debian/patches/series


-- 
Libav/FFmpeg packaging