[GlobalISel] Separate matchers with newlines in emitted selector. NFC.
[GlobalISel] Separate matchers with newlines in emitted selector. NFC.

We don't try very hard to format the emitted code, but newlines
are an easy way to make it more readable.

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@294074 91177308-0d34-0410-b5e6-96231b3b80d8
(cherry picked from commit 40d6dfa91e56d0edeca895d1a8a2f6dbcf11df24)

apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm