[clang] [llvm] [clang] Add fixed point precision macros (PR #81207)

[Aaron Ballman via cfe-commits]

================
@@ -297,6 +297,12 @@ DWARF Support in Clang
 Floating Point Support in Clang
 -------------------------------
 
+Fixed Point Support in Clang
+-------------------------------
----------------
AaronBallman wrote:

```suggestion
Fixed Point Support in Clang
-----------------------------
```


https://github.com/llvm/llvm-project/pull/81207