Bug 1496297 - Use |jit-test| skip-if as appropriate to jit-test/tests/wasm/ (r=jorendorff)

if (!wasmThreadsSupported())

    quit(0);

// |jit-test| skip-if: !wasmThreadsSupported()

const oob = /index out of bounds/;

const unaligned = /unaligned memory access/;

if (!wasmStreamingIsSupported())

    quit();

// |jit-test| skip-if: !wasmStreamingIsSupported()

const {Module, Instance, compileStreaming} = WebAssembly;

if (!wasmGcEnabled())

    quit(0);

// |jit-test| skip-if: !wasmGcEnabled()

// We can read the object fields from JS, and write them if they are mutable.

if (!wasmGcEnabled() || typeof WebAssembly.Global !== 'function') {

    quit(0);

}

// |jit-test| skip-if: !wasmGcEnabled() || typeof WebAssembly.Global !== 'function'

// Dummy object.

function Baguette(calories) {

if (!wasmGcEnabled()) {

    quit(0);

}

// |jit-test| skip-if: !wasmGcEnabled()

const { startProfiling, endProfiling, assertEqPreciseStacks, isSingleStepProfilingEnabled } = WasmHelpers;