package/libpri: fix static build

pritest, rosetest and testprilib needs a static library and pridump
needs a dynamic library resulting in the following static build failure
since the addition of the package in commit
a77f356b78f9134227f9702a1eb09c3203c42d88:

/home/autobuild/autobuild/instance-15/output-1/host/bin/aarch64_be-buildroot-linux-uclibc-gcc -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -O2 -g0  -static -fPIC -MD -MT pridump.o -MF .pridump.o.d -MP -c -o pridump.o pridump.c
/home/autobuild/autobuild/instance-15/output-1/host/bin/aarch64_be-buildroot-linux-uclibc-gcc -static -shared -Wl,-hlibpri.so.1.4  -o libpri.so.1.4 copy_string.o pri.o q921.o prisched.o q931.o pri_aoc.o pri_cc.o pri_facility.o asn1_primitive.o rose.o rose_address.o rose_etsi_aoc.o rose_etsi_cc.o rose_etsi_diversion.o rose_etsi_ect.o rose_etsi_mwi.o rose_other.o rose_q931.o rose_qsig_aoc.o rose_qsig_cc.o rose_qsig_ct.o rose_qsig_diversion.o rose_qsig_mwi.o rose_qsig_name.o version.o
/home/autobuild/autobuild/instance-15/output-1/host/lib/gcc/aarch64_be-buildroot-linux-uclibc/10.3.0/../../../../aarch64_be-buildroot-linux-uclibc/bin/ld: /home/autobuild/autobuild/instance-15/output-1/host/aarch64_be-buildroot-linux-uclibc/sysroot/lib/../lib64/libc.a(__uClibc_main.os): in function `__uClibc_fini':
__uClibc_main.c:(.text+0xd0): undefined reference to `__fini_array_start'

Fixes:
 - http://autobuild.buildroot.org/results/1217922af3a72646ae242c2c4dec22ead7883b91

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

package/libpri/libpri.mk

@@ -17,6 +17,7 @@ LIBPRI_INSTALL_STAGING = YES
 # So we need to explicitly build only what we can.
 ifneq ($(BR2_SHARED_LIBS),y)
 LIBPRI_LIBS = libpri.a
+LIBPRI_UTILS += pritest rosetest testprilib
 define LIBPRI_INSTALL_A
 	$(INSTALL) -D -m 0644 $(@D)/libpri.a $(1)/usr/lib/libpri.a
 endef
@@ -24,14 +25,13 @@ endif
 
 ifneq ($(BR2_STATIC_LIBS),y)
 LIBPRI_LIBS += libpri.so.1.4
+LIBPRI_UTILS += pridump
 define LIBPRI_INSTALL_SO
 	$(INSTALL) -D -m 0644 $(@D)/libpri.so.1.4 $(1)/usr/lib/libpri.so.1.4
 	ln -sf libpri.so.1.4 $(1)/usr/lib/libpri.so
 endef
 endif
 
-LIBPRI_UTILS = pridump pritest rosetest testprilib
-
 define LIBPRI_BUILD_CMDS
 	$(TARGET_MAKE_ENV) $(MAKE1) $(TARGET_CONFIGURE_OPTS) \
 		CFLAGS="$(TARGET_CFLAGS) -fPIC" -C $(@D) \