Put all LLVM code into the llvm namespace, as per bug 109.

llvm-svn: 9903
diff --git a/llvm/tools/gccas/gccas.cpp b/llvm/tools/gccas/gccas.cpp
index d97c716..c7a2204 100644
--- a/llvm/tools/gccas/gccas.cpp
+++ b/llvm/tools/gccas/gccas.cpp
@@ -27,6 +27,8 @@
 #include <memory>
 #include <fstream>
 
+using namespace llvm;
+
 namespace {
   cl::opt<std::string>
   InputFilename(cl::Positional,cl::desc("<input llvm assembly>"),cl::init("-"));