[Wasm] Convert many of the fixed-size values to LEB128.

test/unittests/wasm/wasm-macro-gen-unittest.cc

Index: test/unittests/wasm/wasm-macro-gen-unittest.cc
diff --git a/test/unittests/wasm/wasm-macro-gen-unittest.cc b/test/unittests/wasm/wasm-macro-gen-unittest.cc
index cb60b6c03f5e3bee9fd05d0b1c089c8938106c57..639f6921f8e96d60067bc27578dd6a7c225f84e2 100644
--- a/test/unittests/wasm/wasm-macro-gen-unittest.cc
+++ b/test/unittests/wasm/wasm-macro-gen-unittest.cc
@@ -93,7 +93,7 @@ TEST_F(WasmMacroGenTest, MacroStatements) {
 }
 
 TEST_F(WasmMacroGenTest, BrTable) {
-  EXPECT_SIZE(7, WASM_BR_TABLE(WASM_ZERO, 1, BR_TARGET(1)));
+  EXPECT_SIZE(8, WASM_BR_TABLE(WASM_ZERO, 1, BR_TARGET(1)));
 }