behavior tests: prevent disabled tests from lowering std.Target

Author: andrewrk

test/behavior/align.zig

@@ -165,8 +165,9 @@ fn give() anyerror!u128 {
 }
 
 test "page aligned array on stack" {
-    if (builtin.zig_backend == .stage2_x86_64 or builtin.zig_backend == .stage2_arm or
-        builtin.zig_backend == .stage2_wasm) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
 
     // Large alignment value to make it hard to accidentally pass.
     var array align(0x1000) = [_]u8{ 1, 2, 3, 4, 5, 6, 7, 8 };
@@ -189,12 +190,14 @@ fn noop1() align(1) void {}
 fn noop4() align(4) void {}
 
 test "function alignment" {
-    // function alignment is a compile error on wasm32/wasm64
-    if (native_arch == .wasm32 or native_arch == .wasm64) return error.SkipZigTest;
-
+    if (builtin.zig_backend == .stage2_c) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest;
     if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest;
     if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
 
+    // function alignment is a compile error on wasm32/wasm64
+    if (native_arch == .wasm32 or native_arch == .wasm64) return error.SkipZigTest;
+
     try expect(derp() == 1234);
     try expect(@TypeOf(noop1) == fn () align(1) void);
     try expect(@TypeOf(noop4) == fn () align(4) void);