[build-script-impl] Allow cross-compiling the host toolchain for Android

Author: finagolfin

utils/build-script-impl

@@ -917,7 +917,7 @@ function false_true() {
 CROSS_COMPILE_HOSTS=($CROSS_COMPILE_HOSTS)
 for t in "${CROSS_COMPILE_HOSTS[@]}"; do
     case ${t} in
-        iphone* | appletv* | watch* | linux-armv6 | linux-armv7 )
+        iphone* | appletv* | watch* | linux-armv6 | linux-armv7 | android-* )
             ;;
         *)
             echo "Unknown host to cross-compile for: ${t}"