PAM_yubico : build fix (#1747)

sys-auth/pam_yubico/pam_yubico-2.24.recipe

@@ -4,7 +4,7 @@ Yubikey into your existing user authentication infrastructure."
 HOMEPAGE="https://developers.yubico.com/yubico-pam/"
 COPYRIGHT="2008-2016 Yubico AB"
 LICENSE="BSD (2-clause)"
-REVISION="2"
+REVISION="3"
 SOURCE_URI="https://developers.yubico.com/yubico-pam/Releases/pam_yubico-$portVersion.tar.gz"
 CHECKSUM_SHA256="0326ff676e2b32ed1dda7fb5f1358a22d629d71caad8f8db52138bbf3e95e82d"
 SOURCE_DIR="pam_yubico-$portVersion"
@@ -36,6 +36,7 @@ BUILD_REQUIRES="
 	devel:libyubikey$secondaryArchSuffix
 	"
 BUILD_PREREQUIRES="
+	cmd:aclocal
 	cmd:autoconf
 	cmd:automake
 	cmd:asciidoc
@@ -51,6 +52,11 @@ BUILD_PREREQUIRES="
 
 BUILD()
 {
+	libtoolize --force --copy --install
+	aclocal
+	autoconf
+	automake --add-missing
+
 	runConfigure ./configure
 	make $jobArgs
 }