refactor

- extract patch to version file
- added silent to bootstrap configure functions & glibc patch section
- renamed build.sh to build.bash
- moved flags, utilities and version to their own files
- extract glibc patch url to version file

flags.bash

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+
+export LC_ALL="POSIX"
+
+export TARGET="x86_64-axe-linux-gnu"
+
+export MAKEFLAGS="-j$(nproc) --no-print-directory --silent"
+
+export SYSROOT="$PWD/sysroot"
+
+export PROJDIR="$PWD"
+
+export SOURCES="$SYSROOT/sources"
+
+export CROSS="$SYSROOT/cross"
+
+export PATH="$CROSS/bin:/usr/bin:/usr/sbin"
+
+export CONFIG_SITE="$SYSROOT/usr/share/config.site"