Tweak version-check.sh script

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@8520 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

prologue/hostreqs.xml

@@ -140,13 +140,13 @@ bash --version | head -n1 | cut -d" " -f2-4
 ls -l `which sh`
 echo -n "Binutils: "; ld --version | head -n1 | cut -d" " -f3-
 bison --version | head -n1
-ls -l `which yacc`
+f [ -e /usr/bin/yacc ]; then ls -l /usr/bin/yacc; else echo "yacc not found"; fi
 bzip2 --version 2>&1 < /dev/null | head -n1 | cut -d" " -f1,6-
 echo -n "Coreutils: "; chown --version | head -n1 | cut -d")" -f2
 diff --version | head -n1
 find --version | head -n1
 gawk --version | head -n1
-ls -l `which awk`
+if [ -e /usr/bin/awk ]; then ls -l /usr/bin/awk; else echo "awk not found"; fi
 gcc --version | head -n1
 /lib/libc.so.6 | head -n1 | cut -d" " -f1-7
 grep --version | head -n1