procps-ng: fix printf/scanf format specifier for musl (%Lu is not portable).

Found by @chneukirchen!

srcpkgs/procps-ng/template

@@ -1,7 +1,7 @@
 # Template file for 'procps-ng'
 pkgname=procps-ng
 version=3.3.11
-revision=2
+revision=3
 build_style=gnu-configure
 configure_args="--exec-prefix=/ --bindir=/usr/bin --sbindir=/usr/bin
  --libdir=/usr/lib --disable-kill --enable-watch8bit
@@ -21,6 +21,8 @@ post_extract() {
 	sed -i 's,ncursesw/ncurses.h,ncurses.h,g' watch.c
 }
 pre_configure() {
+	# printf %Lu is not portable.
+	sed -i 's,%Lu,%llu,g' top/top.c proc/{sysinfo,readproc}.c
 	autoreconf -fi
 }
 post_install() {