syslinux: changed back to "just install" mode, as it fails to build on x86_64 hosts

We need to implement a flag to avoid gcc mangling in "sensitive" packages like this
and qemu for example

x86/syslinux/syslinux.conf

@@ -14,8 +14,12 @@
 # GNU General Public License can be found in the file COPYING.
 # --- SDE-COPYRIGHT-NOTE-END ---
 
-# let's build'em all
-hook_add premake 2 "$MAKE $makeopt clean"
+# syslinux community wants people to rebuild *only* ITARGETS, which
+# is empty currently (3.70)
+# 3.70: clean + all fails when the host is x86_64
+## let's build'em all
+#hook_add premake 2 "$MAKE $makeopt clean"
+makeopt=
 
 var_remove GCC2_WRAPPER_INSERT ' ' "-fstack-protector"
 var_remove GCC3_WRAPPER_INSERT ' ' "-fstack-protector"