package/libblockdev: fix patch fuzz

Commit 8f88a644ed "support/scripts/apply-patches.sh: set the maximum
fuzz factor to 0" reduced the fuzz factor.

Due to this change, libblockdev fails to build with output:

    Applying 0001-Provide-replacement-function-for-strerror_l.patch using patch:
    patching file configure.ac
    patching file src/utils/module.c
    Hunk #1 FAILED at 28.

This commit fixes the Provide replacement function for strerror_l()
patch so that it applies.

Fixes:
http://autobuild.buildroot.net/results/df5/df54118cc7057ba8dd566515281b77c49a596a04

Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>

package/libblockdev/0001-Provide-replacement-function-for-strerror_l.patch

@@ -41,8 +41,8 @@ index 6557c3ab..5893f0ac 100644
  #include "logging.h"
 +#include "utils.h"
  
- #define UNUSED __attribute__((unused))
  
+ /**
 diff --git a/src/utils/utils.h b/src/utils/utils.h
 index 801a8b6e..b2bdf0d0 100644
 --- a/src/utils/utils.h