Auto merge of rust-lang#9 - Amanieu:patch-1, r=japaric

Include additional types from libc

Copied a few extra definitions from the libc crate.

src/lib.rs

@@ -103,6 +103,18 @@ pub type c_uchar = u8;
 pub type c_ushort = u16;
 pub type c_ulonglong = u64;
 
+pub type c_float = f32;
+pub type c_double = f64;
+
+pub type intmax_t = i64;
+pub type uintmax_t = u64;
+
+pub type size_t = usize;
+pub type ptrdiff_t = isize;
+pub type intptr_t = isize;
+pub type uintptr_t = usize;
+pub type ssize_t = isize;
+
 // NOTE from libc v0.2.23
 // Use repr(u8) as LLVM expects `void*` to be the same as `i8*` to help enable
 // more optimization opportunities around it recognizing things like