Build SDK for the local hardware

It's likely that you want to build the SDK to run on the emulator on your
machine, so let's default to that, rather than aarch64.

tools/sdk/build_rust_sdk.sh

@@ -59,6 +59,10 @@ buildApp=${buildApp:-no}
 
 cd "${elementPwd}"
 
+default_arch="$(uname -m)-linux-android"
+read -p "Enter the architecture you want to build for (default '$default_arch'): " target_arch
+target_arch="${target_arch:-${default_arch}}"
+
 # If folder ../matrix-rust-components-kotlin does not exist, clone the repo
 if [ ! -d "../matrix-rust-components-kotlin" ]; then
     printf "\nFolder ../matrix-rust-components-kotlin does not exist. Cloning the repository into ../matrix-rust-components-kotlin.\n\n"
@@ -71,8 +75,8 @@ git reset --hard
 git checkout main
 git pull
 
-printf "\nBuilding the SDK for aarch64-linux-android...\n\n"
-./scripts/build.sh -p "${rustSdkPath}" -m sdk -t aarch64-linux-android -o "${elementPwd}/libraries/rustsdk"
+printf "\nBuilding the SDK for ${target_arch}...\n\n"
+./scripts/build.sh -p "${rustSdkPath}" -m sdk -t "${target_arch}" -o "${elementPwd}/libraries/rustsdk"
 
 cd "${elementPwd}"
 mv ./libraries/rustsdk/sdk-android-debug.aar ./libraries/rustsdk/matrix-rust-sdk.aar