libcurl: LICENSE value changes to SPDX
The curl license is a MIT/X derivative license, but
has a distinct identifier in SPDX, so use that:
https://spdx.org/licenses/curl.html
[Peter: reword commit message]
Signed-off-by: Naoki Matsumoto <n-matsumoto@melcoinc.co.jp>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit d80110a635c23aac17dabf2e58b580470749a2c9)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Naoki Matsumoto