build-android: specify commit (#904)

scripts/android/build-android.sh

@@ -4,6 +4,7 @@ set -eu
 
 u="$USER"
 tmp=$(mktemp -d -t)
+commit="${1:-nix-android}"
 commands="nix git gradle unzip curl"
 
 nix_install() {
@@ -32,7 +33,7 @@ git_setup() {
   git clone https://github.com/simplex-chat/simplex-chat "$tmp/simplex-chat"
 
   # Switch to nix-android branch
-  git -C "$tmp/simplex-chat" checkout nix-android
+  git -C "$tmp/simplex-chat" checkout "$commit"
 
   # Create missing folders
   mkdir -p "$tmp/simplex-chat/apps/android/app/src/main/cpp/libs/arm64-v8a"
@@ -40,6 +41,7 @@ git_setup() {
 
 checks() {
   set +u
+
   for i in $commands; do
     case $i in
       nix)