Summary:
- This commit changes the default version to "04-15-2021"
to fix a compile error for Cortex-M target
Impact:
- WASM micro runtime (WAMR)
- NOTE: There are still compile warnings in the WAMR which
should be fixed later
Testing:
- Tested with spresense (NOTE: need to add -lm)
- Tested with esp32-devkitc
Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>
