Fix regres script

Change-Id: I97e65fcfdbab5e8ebf823ef528be3a048274a9ef
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/36809
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Antonio Maiorano <amaiorano@google.com>

tests/regres/main.go

diff --git a/tests/regres/main.go b/tests/regres/main.go
index 307f8b8..13a2f85 100644
--- a/tests/regres/main.go
+++ b/tests/regres/main.go
@@ -739,7 +739,7 @@
 		"-DCMAKE_BUILD_TYPE=Release",
 		"-DDCHECK_ALWAYS_ON=1",
 		"-DREACTOR_VERIFY_LLVM_IR=1",
-		"-DWARNINGS_AS_ERRORS=0"
+		"-DWARNINGS_AS_ERRORS=0",
 		".."); err != nil {
 		return err
 	}