Fail to generate abiconv.syms

[jserv]

After install nasm and llvm (see #2), I fail to generate abiconv.syms:

...
Consolidate compiler generated dependencies of target custom_conv_execvp
[ 15%] Built target custom_conv_execvp
[ 15%] Generating abiconv.syms
make[2]: *** [src/abiconv/abiconv.syms] Error 1

Then, I attempted to re-build with make VERBOSE=1 and figure out the problem resulting from the use of objdump. Here is the proposed change against src/abiconv/print_exports_trie.sh:

@@ -22,5 +22,5 @@ done
 shift $((OPTIND-1))
 
 for LIBPATH in "$@"; do
-    objdump -exports-trie "$LIBPATH" | tr -s " " | cut -f 2 -d " " | grep "^_"
+    llvm-objdump --macho --exports-trie "$LIBPATH" | tr -s " " | cut -f 2 -d " " | grep "^_"
 done