[spirv-reader] Update TODOs in test matrix

We've already written those tests.

Bug: tint:3
Change-Id: Ic836be43b5f1220e3563e4d27abd9b5e2ab54460
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/23180
Reviewed-by: dan sinclair <dsinclair@google.com>
diff --git a/src/reader/spirv/function_cfg_test.cc b/src/reader/spirv/function_cfg_test.cc
index 820f969..ab1bf0f 100644
--- a/src/reader/spirv/function_cfg_test.cc
+++ b/src/reader/spirv/function_cfg_test.cc
@@ -10343,10 +10343,10 @@
 //      kBack : symmetry
 //      kSwitchBreak: dup general case
 //      kLoopBreak: invalid; only one kind of break allowed
-//      kLoopContinue: TODO(dneto)
+//      kLoopContinue: TESTED
 //      kIfBreak: invalid: switch and if must have distinct merge blocks
-//      kCaseFallThrough: TODO(dneto)
-//      kForward: TODO(dneto)
+//      kCaseFallThrough: TESTED
+//      kForward: TESTED
 //
 //    kLoopBreak with:
 //      kBack : symmetry
@@ -10362,8 +10362,8 @@
 //      kSwitchBreak: symmetry
 //      kLoopBreak: symmetry
 //      kLoopContinue: dup general case
-//      kIfBreak: TODO(dneto)
-//      kCaseFallThrough: TODO(dneto)
+//      kIfBreak: TESTED
+//      kCaseFallThrough: TESTED
 //      kForward: TESTED
 //
 //    kIfBreak with: