[FFmpeg-cvslog] configure: replace 'pr' with printf since busybox does not support pr

[Guo, Yejun]

ffmpeg | branch: master | Guo, Yejun <yejun.guo at intel.com> | Wed Apr 24 21:13:21 2019 +0800| [ae6486c6251039d3a6bb5a90e1d818331cf55edc] | committer: Alexander Strasser

configure: replace 'pr' with printf since busybox does not support pr

This patch is based on https://trac.ffmpeg.org/ticket/5680 provided by
Kylie McClain <somasis at exherbo.org> at Wed, 29 Jun 2016 16:37:20 -0400,
and have some changes.

contributor: Kylie McClain <somasis at exherbo.org>
contributor: avih <avihpit at yahoo.com>
Signed-off-by: Guo, Yejun <yejun.guo at intel.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ae6486c6251039d3a6bb5a90e1d818331cf55edc
---

 configure | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/configure b/configure
index 580af9c0f6..9b4305cf0d 100755
--- a/configure
+++ b/configure
@@ -503,9 +503,13 @@ log(){
 }
 
 log_file(){
-    log BEGIN $1
-    pr -n -t $1 >> $logfile
-    log END $1
+    log BEGIN "$1"
+    log_file_i=1
+    while IFS= read -r log_file_line; do
+        printf '%5d\t%s\n' "$log_file_i" "$log_file_line"
+        log_file_i=$(($log_file_i+1))
+    done < "$1" >> "$logfile"
+    log END "$1"
 }
 
 warn(){