tint: Change all ProgramBuilder literals to 'i' or 'u' suffix

Unsuffixed integer literals are currently treated as i32,
but will shortly become AbstractInteger. To keep tests behaving
identically to how they are currently, change all test literals
to using either 'i' or 'u' suffixes.

Bug: tint:1504
Change-Id: Ic373d18ce1c718a16b6905568aec89da3641d36b
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/88845
Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
Commit-Queue: Ben Clayton <bclayton@google.com>
diff --git a/src/tint/ast/compound_assignment_statement_test.cc b/src/tint/ast/compound_assignment_statement_test.cc
index 47e7201..7560889 100644
--- a/src/tint/ast/compound_assignment_statement_test.cc
+++ b/src/tint/ast/compound_assignment_statement_test.cc
@@ -17,6 +17,8 @@
 #include "gtest/gtest-spi.h"
 #include "src/tint/ast/test_helper.h"
 
+using namespace tint::number_suffixes;  // NOLINT
+
 namespace tint::ast {
 namespace {
 
@@ -57,7 +59,7 @@
     EXPECT_FATAL_FAILURE(
         {
             ProgramBuilder b;
-            b.create<CompoundAssignmentStatement>(nullptr, b.Expr(1), BinaryOp::kAdd);
+            b.create<CompoundAssignmentStatement>(nullptr, b.Expr(1_i), BinaryOp::kAdd);
         },
         "internal compiler error");
 }
@@ -66,7 +68,7 @@
     EXPECT_FATAL_FAILURE(
         {
             ProgramBuilder b;
-            b.create<CompoundAssignmentStatement>(b.Expr(1), nullptr, BinaryOp::kAdd);
+            b.create<CompoundAssignmentStatement>(b.Expr(1_i), nullptr, BinaryOp::kAdd);
         },
         "internal compiler error");
 }