boinc: fix PIE

srcpkgs/boinc/template

@@ -1,7 +1,7 @@
 # Template file for 'boinc'
 pkgname=boinc
 version=7.6.31
-revision=1
+revision=2
 wrksrc=boinc-client_release-${version%.*}-${version}
 build_style=gnu-configure
 hostmakedepends="automake libtool pkg-config python"
@@ -32,7 +32,7 @@ do_configure() {
 	mkdir nox
 	cp -ar x11/* nox
 	cd ${wrksrc}/x11
-	LDFLAGS="-lX11" ./configure \
+	LDFLAGS="${LDFLAGS} -lX11" ./configure \
 		${configure_args} \
 		--enable-libraries \
 		--enable-unicode \