Travis, note changelog, disable homebrew update in script and cfg.

.travis.yml

@@ -155,6 +155,7 @@ jobs:
         - IOS_SDK=iPhoneOS
         - IOS_CPU=arm64
         - IOS_PREFIX="$HOME/$IOS_SDK-$IOS_CPU"
+        - HOMEBREW_NO_AUTO_UPDATE=1
 #    - os: osx
 #      osx_image: xcode10
 #      name: Apple TV on iOS, arm64

contrib/ios/install_tools.sh

@@ -6,4 +6,5 @@
 #brew update 1>/dev/null
 echo "Installing tools"
 # already installed are: autoconf automake libtool pkg-config
-brew install curl perl 1>/dev/null
+#brew install curl perl 1>/dev/null
+HOMEBREW_NO_AUTO_UPDATE=1 brew install curl perl 1>/dev/null

doc/Changelog

@@ -3,6 +3,9 @@
 	  when there is a difference. homebrew updates disabled, so it does
 	  not hang. removed trailing slashes from configure paths. Moved iOS
 	  tests to allow-failure.
+	- travis, analyzer disabled on test without debug, that does not
+	  run anway.  Turn off failing tests except one.  Update iOS test
+	  to xcode image 12.2.
 
 22 March 2021: George
 	- Fix unused-function warning when compiling with --enable-dnscrypt.