Strip Zano from native build loops on Android and iOS

Zano was already removed at the configure layer, but the per-platform
build_monero_all.sh scripts still compiled libzano_wallet2_api_c on
Android and iOS — wasted build minutes for a chain we don't ship.

Linux + macOS already had the trimmed loop.

scripts/android/build_monero_all.sh

@@ -9,7 +9,7 @@ cd "$(dirname "$0")"
 
 ../prepare_moneroc.sh
 
-for COIN in monero wownero zano;
+for COIN in monero wownero;
 do
     pushd ../monero_c
         monero_c_tag=$(git describe --tags)

scripts/ios/build_monero_all.sh

@@ -15,7 +15,7 @@ cd "$(dirname "$0")"
 
 ../prepare_moneroc.sh
 
-for COIN in monero wownero zano;
+for COIN in monero wownero;
 do
     pushd ../monero_c
         ./build_single.sh ${COIN} aarch64-apple-ios -j$MAKE_JOB_COUNT