Fix some Fluent typos

Author: clubby789

compiler/rustc_error_messages/locales/en-US/codegen_gcc.ftl

@@ -23,7 +23,7 @@ codegen_gcc_invalid_monomorphization_unsupported_element =
     invalid monomorphization of `{$name}` intrinsic: unsupported {$name} from `{$in_ty}` with element `{$elem_ty}` to `{$ret_ty}`
 
 codegen_gcc_invalid_monomorphization_invalid_bitmask =
-    invalid monomorphization of `{$name}` intrinsic: invalid bitmask `{ty}`, expected `u{$expected_int_bits}` or `[u8; {$expected_bytes}]`
+    invalid monomorphization of `{$name}` intrinsic: invalid bitmask `{$ty}`, expected `u{$expected_int_bits}` or `[u8; {$expected_bytes}]`
 
 codegen_gcc_invalid_monomorphization_simd_shuffle =
     invalid monomorphization of `{$name}` intrinsic: simd_shuffle index must be an array of `u32`, got `{$ty}`

compiler/rustc_error_messages/locales/en-US/codegen_ssa.ftl

@@ -179,9 +179,9 @@ codegen_ssa_extract_bundled_libs_write_file = failed to write file '{$rlib}': {$
 
 codegen_ssa_unsupported_arch = unsupported arch `{$arch}` for os `{$os}`
 
-codegen_ssa_apple_sdk_error_sdk_path = failed to get {$sdk_name} SDK path: {error}
+codegen_ssa_apple_sdk_error_sdk_path = failed to get {$sdk_name} SDK path: {$error}
 
-codegen_ssa_read_file = failed to read file: {message}
+codegen_ssa_read_file = failed to read file: {$message}
 
 codegen_ssa_unsupported_link_self_contained = option `-C link-self-contained` is not supported on this target