Add External/build to .gitignore

cntrump · hannesa2 · commit 89288b071c3e · 2021-02-05T07:59:45.000+01:00
diff --git a/.gitignore b/.gitignore
@@ -32,3 +32,4 @@ External/libssh2-ios
 
 Carthage/Build
 
+External/build
