developer build script: avoided hard-coding the luajit library path in the nginx binary RPATH.

This is because we usually want to use a different luajit for valgrind
testing mode.

Author: agentzh

util/build.sh

@@ -15,7 +15,7 @@ force=$2
           #--with-cc=gcc46 \
 
 ngx-build $force $version \
-            --with-ld-opt="-L$PCRE_LIB -Wl,-rpath,$PCRE_LIB:$LIBDRIZZLE_LIB:$LUAJIT_LIB:/usr/local/lib" \
+            --with-ld-opt="-L$PCRE_LIB -Wl,-rpath,$PCRE_LIB:$LIBDRIZZLE_LIB:/usr/local/lib" \
           --with-cc-opt="-O3 -funsigned-char" \
           --with-http_addition_module \
           --add-module=$root $opts \