incr-check: specify backend in manifest, allow multiple targets/backends

test/incremental/add_decl

@@ -1,4 +1,5 @@
-#target=x86_64-linux
+#target=x86_64-linux-selfhosted
+#target=x86_64-linux-cbe
 #update=initial version
 #file=main.zig
 const std = @import("std");

test/incremental/add_decl_namespaced

@@ -1,4 +1,5 @@
-#target=x86_64-linux
+#target=x86_64-linux-selfhosted
+#target=x86_64-linux-cbe
 #update=initial version
 #file=main.zig
 const std = @import("std");

test/incremental/delete_comptime_decls

@@ -1,4 +1,5 @@
-#target=x86_64-linux
+#target=x86_64-linux-selfhosted
+#target=x86_64-linux-cbe
 #update=initial version
 #file=main.zig
 pub fn main() void {}

test/incremental/hello

@@ -1,4 +1,5 @@
-#target=x86_64-linux
+#target=x86_64-linux-selfhosted
+#target=x86_64-linux-cbe
 #update=initial version
 #file=main.zig
 const std = @import("std");

test/incremental/modify_inline_fn

@@ -1,4 +1,5 @@
-#target=x86_64-linux
+#target=x86_64-linux-selfhosted
+#target=x86_64-linux-cbe
 #update=initial version
 #file=main.zig
 const std = @import("std");

test/incremental/move_src

@@ -1,4 +1,5 @@
-#target=x86_64-linux
+#target=x86_64-linux-selfhosted
+#target=x86_64-linux-cbe
 #update=initial version
 #file=main.zig
 const std = @import("std");

test/incremental/remove_enum_field

@@ -1,4 +1,5 @@
-#target=x86_64-linux
+#target=x86_64-linux-selfhosted
+#target=x86_64-linux-cbe
 #update=initial version
 #file=main.zig
 const MyEnum = enum(u8) {

test/incremental/type_becomes_comptime_only

@@ -1,4 +1,5 @@
-#target=x86_64-linux
+#target=x86_64-linux-selfhosted
+#target=x86_64-linux-cbe
 #update=initial version
 #file=main.zig
 const SomeType = u32;

test/incremental/unreferenced_error

@@ -1,4 +1,5 @@
-#target=x86_64-linux
+#target=x86_64-linux-selfhosted
+#target=x86_64-linux-cbe
 #update=initial version
 #file=main.zig
 const std = @import("std");