SCI: Make all global script patch signatures const.
SCI: Constify selectorNameTable.
SCI: Make all script patch related global data static.
SCI: Fix formatting in engine/script_patches.cpp.

Powered by astyle and some manual work to avoid breaking multiple statement
lines into multiple lines consisting of single statements.
SCI: Revert "+xx" to "+ xx" changes in 6f2e88136b20fb02d38cd594611c865f44fe8e1a.

After discussing with m_kiewitz that these have been intentional.