libc-headers: Extract header files from kernel.

Previously, there have been header sanizied header files used
from kernel 2.6.12.0, which got harder to maintain over the
years and may cause unseen problems.

make.sh

@@ -265,11 +265,7 @@ buildtoolchain() {
     lfsmake1 binutils	PASS=1
     lfsmake1 gcc		PASS=1
     export PATH=$BASEDIR/build/usr/local/bin:$BASEDIR/build/tools/bin:$PATH
-    if [ "${MACHINE_TYPE}" = "arm" ]; then
-        lfsmake1 linux TOOLS=1 HEADERS=1
-    else
-        lfsmake1 linux-libc-header
-    fi
+    lfsmake1 linux TOOLS=1 HEADERS=1
     lfsmake1 glibc
     lfsmake1 cleanup-toolchain PASS=1
     lfsmake1 fake-environ
@@ -306,11 +302,7 @@ buildbase() {
     LOGFILE="$BASEDIR/log/_build.base.log"
     export LOGFILE
     lfsmake2 stage2
-    if [ "${MACHINE_TYPE}" = "arm" ]; then
-        lfsmake2 linux HEADERS=1
-    else
-        lfsmake2 linux-libc-header
-    fi
+    lfsmake2 linux HEADERS=1
     lfsmake2 man-pages
     lfsmake2 glibc
     lfsmake2 tzdata