package/libmediaart: fix static build

Fix the following static build failure raised since bump to version
1.9.5 in commit 3db4d486:

/home/buildroot/autobuild/instance-0/output-1/host/opt/ext-toolchain/bin/../lib/gcc/arm-buildroot-linux-uclibcgnueabi/9.3.0/../../../../arm-buildroot-linux-uclibcgnueabi/bin/ld: /home/buildroot/autobuild/instance-0/output-1/host/arm-buildroot-linux-uclibcgnueabi/sysroot/usr/lib/libc.a(__uClibc_main.os): in function `__uClibc_fini':
__uClibc_main.c:(.text+0x15c): undefined reference to `__fini_array_start'

Fixes:
 - http://autobuild.buildroot.org/results/18d26882a68dcf8f09b3e3d25636454a12939310



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