Prefix external symbols in llvm-c-test.

This makes it less likely to clash with other stuff that might be linked
in by change, e.g. ncurses exposes an external function called simply
"echo", so linking ncurses statically into the binary explodes in funny
ways.

llvm-svn: 259882
diff --git a/llvm/tools/llvm-c-test/disassemble.c b/llvm/tools/llvm-c-test/disassemble.c
index 05a9218..7d6f178 100644
--- a/llvm/tools/llvm-c-test/disassemble.c
+++ b/llvm/tools/llvm-c-test/disassemble.c
@@ -83,12 +83,12 @@
   do_disassemble(triple, features, disbuf, disbuflen);
 }
 
-int disassemble(void) {
+int llvm_disassemble(void) {
   LLVMInitializeAllTargetInfos();
   LLVMInitializeAllTargetMCs();
   LLVMInitializeAllDisassemblers();
 
-  tokenize_stdin(handle_line);
+  llvm_tokenize_stdin(handle_line);
 
   return 0;
 }