make.sh: Do not decrease nice level of build

This was designed to keep a workstation that is compiling IPFire
responsive during the build. However, the kernel's scheduler has been
improved enough that this is no longer an issue.

Instead of telling the kernel that the build job is something with a
lower priority (which it isn't) we now simply run with the nicelevel of
the parent process that has called make.sh.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

make.sh

@@ -29,7 +29,6 @@ VERSION="2.25"							# Version number
 CORE="154"							# Core Level (Filename)
 SLOGAN="www.ipfire.org"						# Software slogan
 CONFIG_ROOT=/var/ipfire						# Configuration rootdir
-NICE=10								# Nice level
 MAX_RETRIES=1							# prefetch/check loop
 BUILD_IMAGES=1							# Flash and Xen Downloader
 KVER=`grep --max-count=1 VER lfs/linux | awk '{ print $3 }'`
@@ -435,11 +434,6 @@ prepareenv() {
 	# Trap on emergency exit
 	trap "exiterror 'Build process interrupted'" SIGINT SIGTERM SIGKILL SIGSTOP SIGQUIT
 
-	# Resetting our nice level
-	if ! renice ${NICE} $$ >/dev/null; then
-			exiterror "Failed to set nice level to ${NICE}"
-	fi
-
 	# Checking if running as root user
 	if [ $(id -u) -ne 0 ]; then
 			exiterror "root privileges required for building"