Fix Regres regression post CMake var renaming

CMake variables were renamed in
https://swiftshader-review.googlesource.com/c/SwiftShader/+/39909

This means regres has been running without DCHECK_ALWAYS_ON enabled,
possibly resulting in false positives when SwiftShader would assert.

Bug: n/a
Change-Id: Ifc4963a6c562bd21db9e1775e06dc5d4ff20f290
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/41908
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Antonio Maiorano <amaiorano@google.com>
diff --git a/tests/regres/cmd/regres/main.go b/tests/regres/cmd/regres/main.go
index 777e26b..ac8150f 100644
--- a/tests/regres/cmd/regres/main.go
+++ b/tests/regres/cmd/regres/main.go
@@ -855,9 +855,9 @@
 
 	if err := shell.Shell(buildTimeout, t.r.cmake, t.buildDir,
 		"-DCMAKE_BUILD_TYPE=Release",
-		"-DDCHECK_ALWAYS_ON=1",
+		"-DSWIFTSHADER_DCHECK_ALWAYS_ON=1",
 		"-DREACTOR_VERIFY_LLVM_IR=1",
-		"-DWARNINGS_AS_ERRORS=0",
+		"-DSWIFTSHADER_WARNINGS_AS_ERRORS=0",
 		".."); err != nil {
 		return err
 	}