removed too much at last commit. Re-added BOOT_* vars

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@2509 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter05/gcc-pass2-inst.xml

@@ -17,7 +17,8 @@ cd ../gcc-build</userinput></screen></para>
 &nbsp;&nbsp;&nbsp;&nbsp;--with-local-prefix=/stage1 \
 &nbsp;&nbsp;&nbsp;&nbsp;--enable-clocale=gnu --enable-shared \
 &nbsp;&nbsp;&nbsp;&nbsp;--enable-threads=posix --enable-__cxa_atexit
-make LDFLAGS="-s"
+make BOOT_LDFLAGS="-s" BOOT_CFLAGS="-O2 -pipe" \
+&nbsp;&nbsp;&nbsp;&nbsp;STAGE1_CFLAGS="-pipe" bootstrap
 make -k check
 make install</userinput></screen></para>