Update big-endian build docs

Author: solidpixel

Docs/Building-BE.md

@@ -1,10 +1,8 @@
 # Building Big Endian ASTC Encoder
 
-**NOTE:** The current code is _NOT_ BE compatible, but we plan to fix this!
-
-We don't officially support a big-endian compressor build, but ensuring the
-code is BE-compatible is good practice and some of the open source
-distributions still support BE platforms.
+We don't officially support the big-endian compressor build, and it is only 
+lightly tested, but ensuring that the code is BE-compatible is good practice 
+and some of the open source distributions still support BE platforms. 
 
 Even though Arm64 can run in a BE mode, it's now very rare in practice. It's no
 longer supported out of the box in the latest Arm upstream compiler releases,