package/numactl: needs -fPIC

This will avoid the following build failure with qemu 5.0.0 and above:

/srv/storage/autobuild/run/instance-2/output-1/host/opt/ext-toolchain/bin/../lib/gcc/x86_64-buildroot-linux-uclibc/8.3.0/../../../../x86_64-buildroot-linux-uclibc/bin/ld: /srv/storage/autobuild/run/instance-2/output-1/host/x86_64-buildroot-linux-uclibc/sysroot/usr/lib/../lib64/libnuma.a(libnuma.o): relocation R_X86_64_32 against `.rodata.str1.1' can not be used when making a PIE object; recompile with -fPIC

Fixes:
 - http://autobuild.buildroot.org/results/616dff216a215dc0494c846d337e03e0795b2fb2

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 6fe0298eecb50a5145bc20411af24dc22cfcf861)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/numactl/numactl.mk

@@ -10,5 +10,6 @@ NUMACTL_LICENSE = LGPL-2.1 (libnuma), GPL-2.0 (programs)
 NUMACTL_LICENSE_FILES = README.md
 NUMACTL_INSTALL_STAGING = YES
 NUMACTL_AUTORECONF = YES
+NUMACTL_CONF_ENV = CFLAGS="$(TARGET_CFLAGS) -fPIC"
 
 $(eval $(autotools-package))