qtdeclarative, qtserialport: Update QT_MODULE_BRANCH

* SHA-1 of v5.2.1 is only in release branch

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
qtwayland: Use default LICENSE and LIC_FILES_CHKSUM

* license texts were added in qtwayland commit 26bdc66fe6c4499332b2ead886a806d09aa07a8a

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>