Merge pull request #5250 from apple/enable-sil-verify-all-flag

[Preset] Enable sil-verify-all for pull request testing

Author: shahmishal

utils/build-presets.ini

@@ -992,6 +992,9 @@ playgroundsupport
 
 dash-dash
 
+# Run the SIL verifier after each transform when building swift files
+sil-verify-all
+
 # Don't run host tests for iOS, tvOS and watchOS platforms to make the build
 # faster.
 skip-test-ios-host