package/sox: fix static build with magic and bzip2

package/sox: fix static build with magic and bzip2

Update patch added by commit 183d583fb5f19eb11637873d73e13fe14536efa6 to
use pkg-config instead of linking with zlib to fix the following static
build failure with a bzip2-enabled libmagic:

/home/buildroot/autobuild/instance-1/output-1/host/opt/ext-toolchain/bin/../lib/gcc/arc-buildroot-linux-uclibc/9.3.1/../../../../arc-buildroot-linux-uclibc/bin/ld: /home/buildroot/autobuild/instance-1/output-1/host/arc-buildroot-linux-uclibc/sysroot/usr/lib/libmagic.a(compress.o): in function `uncompressbuf':
compress.c:(.text+0x422): undefined reference to `BZ2_bzDecompressInit'
/home/buildroot/autobuild/instance-1/output-1/host/opt/ext-toolchain/bin/../lib/gcc/arc-buildroot-linux-uclibc/9.3.1/../../../../arc-buildroot-linux-uclibc/bin/ld: compress.c:(.text+0x422): undefined reference to `BZ2_bzDecompressInit'

Fixes:
 - http://autobuild.buildroot.org/results/4c511c02e4c63b35ecf77a2658f88e8a0d9dbb4d

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>