docs: Update brew package list

Starting around Feb 27 2018, "python" installs python 3.x instead of
2.x.  Also remove git which should be present from the Xcode command
line tools and python2 which should be present in the base macOS
install.

diff --git a/BUILD.md b/BUILD.md
index a483481..ed3adf2 100644 (file)
--- a/BUILD.md
+++ b/BUILD.md
@@ -383,7 +383,7 @@ If you do not have Java, you can get it with something like the following:
 
 #### Additional OSX System Requirements
 
-Tested on OSX version 10.12.4
+Tested on OSX version 10.13.3
 
 Setup Homebrew and components
 
@@ -395,9 +395,9 @@ Setup Homebrew and components
 
       export PATH=/usr/local/bin:$PATH
 
-- Add packages with the following (may need refinement)
+- Add packages with the following:
 
-      brew install cmake python python3 git
+      brew install cmake python
 
 ### Android Build