tools/bc: update to 1.08.1

refresh patch:
001-no_doc.patch
002-fix-libmath.patch
Changelog included in package.

Signed-off-by: Jack Sun <sunjiazheng321521@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/17828
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

tools/bc/patches/002-fix-libmath.patch

@@ -1,27 +1,6 @@
---- a/bc/fix-libmath_h
-+++ b/bc/fix-libmath_h
-@@ -1,9 +1,9 @@
--ed libmath.h <<EOS-EOS
--1,1s/^/{"/
--1,\$s/\$/",/
--2,\$s/^/"/
--\$,\$d
--\$,\$s/,\$/,0}/
--w
--q
--EOS-EOS
-+#!/usr/bin/env bash
-+sed -e '1   s/^/{"/' \
-+    -e     's/$/",/' \
-+    -e '2,$ s/^/"/'  \
-+    -e   '$ d'       \
-+    -i libmath.h
-+
-+sed -e '$ s/$/0}/' \
-+    -i libmath.h
 --- a/configure
 +++ b/configure
-@@ -5288,7 +5288,7 @@ case $bcle-$bcrl-$LEX in
+@@ -5926,7 +5926,7 @@ case $bcle-$bcrl-$LEX in
     ?-?-flex)
  	LEX="flex -I -8" ;;
     ?-y-*)