Updates around building of Linux Apps
-Adds FLUTTER_BUILD_ARGS. Override with linux
as needed.
-Default FLUTTER_EXTRA_BUILD_ARGS to FLUTTER_RUNTIME
-Adds FLUTTER_REMOVE_LINUX_BUILD_ARTIFACTS.
If not set, it will install binaries to staging dir. You only want this
when the target architecture matches host. flutter build linux
does not
cross-compile.
If set it will remove the artifacts (host) that get installed for target sysroot.
This should be set by default in linux
app recipe.
Signed-off-by: Joel Winarske joel.winarske@gmail.com