package/elfutils: needs host-pkgconf

host-pkgconf is a mandatory dependency since version 0.180 and
https://sourceware.org/git/?p=elfutils.git;a=commit;h=f7f0cdc59a13780938ae3f578955737a75e60ea9

Fixes:
 - http://autobuild.buildroot.org/results/123bdb3e7244800e1717f968c1d371e51f7fff2b

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/elfutils/elfutils.mk

@@ -10,8 +10,8 @@ ELFUTILS_SITE = https://sourceware.org/elfutils/ftp/$(ELFUTILS_VERSION)
 ELFUTILS_INSTALL_STAGING = YES
 ELFUTILS_LICENSE = GPL-2.0+ or LGPL-3.0+ (library)
 ELFUTILS_LICENSE_FILES = COPYING COPYING-GPLV2 COPYING-LGPLV3
-ELFUTILS_DEPENDENCIES = zlib $(TARGET_NLS_DEPENDENCIES)
-HOST_ELFUTILS_DEPENDENCIES = host-zlib host-bzip2 host-xz
+ELFUTILS_DEPENDENCIES = host-pkgconf zlib $(TARGET_NLS_DEPENDENCIES)
+HOST_ELFUTILS_DEPENDENCIES = host-pkgconf host-zlib host-bzip2 host-xz
 
 # We patch configure.ac
 ELFUTILS_AUTORECONF = YES