Add parallel-vectorize prototype.

Add llvm_cbuilder.

llvm_cbuilder/shortnames.py

@@ -0,0 +1,17 @@
+from llvm.core import Type
+
+void = Type.void()
+char = Type.int(8)
+short = Type.int(16)
+int = Type.int(32)
+int16 = short
+int32 = int
+int64 = Type.int(64)
+float = Type.float()
+double = Type.double()
+
+# pointers
+
+pointer = Type.pointer
+
+void_p = pointer(char)