Regres: disable warnings as errors

Bug: b/141758871
Change-Id: I8e21cb19b1cecbd996ed78cbe9fbde46beac0adc
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/36769
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Antonio Maiorano <amaiorano@google.com>
diff --git a/tests/regres/main.go b/tests/regres/main.go
index 674c7fc..307f8b8 100644
--- a/tests/regres/main.go
+++ b/tests/regres/main.go
@@ -739,6 +739,7 @@
 		"-DCMAKE_BUILD_TYPE=Release",
 		"-DDCHECK_ALWAYS_ON=1",
 		"-DREACTOR_VERIFY_LLVM_IR=1",
+		"-DWARNINGS_AS_ERRORS=0"
 		".."); err != nil {
 		return err
 	}