message: [scripts] add `-std=c99` to android build
diff: @@ -198,7 +198,8 @@ OPENTHREAD_ENABLE_ANDROID_MK := 1
  ANDROID_NDK := 1
  OPENTHREAD_PROJECT_CFLAGS := \
  -DOPENTHREAD_CONFIG_MLE_STEERING_DATA_SET_OOB_ENABLE=1 \
  - -DOPENTHREAD_PROJECT_CORE_CONFIG_FILE=\"openthread-core-posix-config.h\"
  + -DOPENTHREAD_PROJECT_CORE_CONFIG_FILE=\"openthread-core-posix-config.h\" \
  + -std=c99
  EOF
  }
  