Explicit set `workspace.resolver = "1"`

rust-lang/cargo#10910 starts emitting warning if resolver is not set
for 2021 edition package. We want to surpress the warning for now.

Cargo.toml

@@ -1,4 +1,5 @@
 [workspace]
+resolver = "1"
 members = [
   "compiler/rustc",
   "library/std",

library/portable-simd/Cargo.toml

@@ -1,5 +1,5 @@
 [workspace]
-
+resolver = "1"
 members = [
     "crates/core_simd",
     "crates/std_float",

src/ci/docker/host-x86_64/test-various/uefi_qemu_test/Cargo.toml

@@ -4,6 +4,7 @@ version = "0.0.0"
 edition = "2021"
 
 [workspace]
+resolver = "1"
 
 [dependencies]
 r-efi = "4.1.0"

src/etc/test-float-parse/Cargo.toml

@@ -5,6 +5,7 @@ edition = "2021"
 publish = false
 
 [workspace]
+resolver = "1"
 
 [dependencies]
 rand = "0.4"