Fix alignment of struct pthread_mutexattr_t for riscv64-linux-gnu

Author: andreas-schwab

src/unix/linux_like/linux/align.rs

@@ -7,15 +7,17 @@ macro_rules! expand_align {
                            target_arch = "mips64",
                            target_arch = "s390x",
                            target_arch = "sparc64",
-                           target_arch = "aarch64"),
+                           target_arch = "aarch64",
+                           target_arch = "riscv64"),
                        repr(align(4)))]
             #[cfg_attr(not(any(target_pointer_width = "32",
                                target_arch = "x86_64",
                                target_arch = "powerpc64",
                                target_arch = "mips64",
                                target_arch = "s390x",
                                target_arch = "sparc64",
-                               target_arch = "aarch64")),
+                               target_arch = "aarch64",
+                               target_arch = "riscv64")),
                        repr(align(8)))]
             pub struct pthread_mutexattr_t {
                 #[doc(hidden)]

src/unix/linux_like/linux/no_align.rs

@@ -7,6 +7,7 @@ macro_rules! expand_align {
                           target_arch = "mips64",
                           target_arch = "s390x",
                           target_arch = "sparc64",
+                          target_arch = "riscv64",
                           all(target_arch = "aarch64",
                               target_env = "musl")))]
                 __align: [::c_int; 0],
@@ -15,6 +16,7 @@ macro_rules! expand_align {
                               target_arch = "mips64",
                               target_arch = "s390x",
                               target_arch = "sparc64",
+                              target_arch = "riscv64",
                               all(target_arch = "aarch64",
                                   target_env = "musl"))))]
                 __align: [::c_long; 0],