Can't build Rive

[pasha-cement]

according CONTRIBUTING.md

call script ./scripts/build.sh all release throws error

kolesnik@i113855532 rive-ios % ./scripts/build.sh all release
++ readlink -f ./scripts/build.sh
+ path=/Users/kolesnik/rive-ios/scripts/build.rive.sh
++ dirname /Users/kolesnik/rive-ios/scripts/build.rive.sh
+ DEV_SCRIPT_DIR=/Users/kolesnik/rive-ios/scripts
+ '[' -d /Users/kolesnik/rive-ios/scripts/../submodules/rive-runtime ']'
+ export RIVE_RUNTIME_DIR=/Users/kolesnik/rive-ios/scripts/../submodules/rive-runtime
+ RIVE_RUNTIME_DIR=/Users/kolesnik/rive-ios/scripts/../submodules/rive-runtime
+ export RIVE_PLS_DIR=/Users/kolesnik/rive-ios/scripts/../submodules/rive-runtime/renderer
+ RIVE_PLS_DIR=/Users/kolesnik/rive-ios/scripts/../submodules/rive-runtime/renderer
+ (( 2 < 1 ))
+ case $1 in
+ case $2 in
+ echo 'Building all Apple runtimes in release...'
Building all Apple runtimes in release...
+ make_dependency_directories
+ rm -fr /Users/kolesnik/rive-ios/scripts/../dependencies
+ mkdir -p /Users/kolesnik/rive-ios/scripts/../dependencies
+ mkdir -p /Users/kolesnik/rive-ios/scripts/../dependencies/debug
+ mkdir -p /Users/kolesnik/rive-ios/scripts/../dependencies/release
+ mkdir -p /Users/kolesnik/rive-ios/scripts/../dependencies/includes
+ mkdir -p /Users/kolesnik/rive-ios/scripts/../dependencies/includes/renderer
+ mkdir -p /Users/kolesnik/rive-ios/scripts/../dependencies/includes/rive
+ mkdir -p /Users/kolesnik/rive-ios/scripts/../dependencies/includes/cg_renderer
+ mkdir -p /Users/kolesnik/rive-ios/scripts/../dependencies/includes/renderer
+ build_all release
+ '[' release '!=' debug ']'
+ '[' release '!=' release ']'
+ build_runtime release
+ build_rive.sh --file=/Users/kolesnik/rive-ios/scripts/../submodules/rive-runtime/premake5_v2.lua ios release --with_rive_audio=system universal clean
./scripts/build.sh: line 31: build_rive.sh: command not found

alsi don't find build_rive.sh in repo

[dskuza]

The TL;DR for the workspace is if you just want to run an example, use the Preview (iOS) scheme, as it uses our Swift package. You can use the Example (iOS) scheme if you'd like to use a locally built C++ runtime, but if you're not making any changes to that runtime, the Preview scheme is enough (and you don't have to work with submodules)

I've updated CONTRIBUTING.md with an updated bash script example on how to build the runtime. However, see my above note.