std.Target.DynamicLinker: define standard paths for alpha, microblaze, sh on netbsd and openbsd

Author: alexrp

lib/std/Target.zig

@@ -2680,16 +2680,20 @@ pub const DynamicLinker = struct {
             },
 
             .netbsd => switch (cpu.arch) {
+                .alpha,
                 .arm,
                 .armeb,
                 .aarch64,
                 .aarch64_be,
+                .hppa,
                 .m68k,
                 .mips,
                 .mipsel,
                 .mips64,
                 .mips64el,
                 .powerpc,
+                .sh,
+                .sheb,
                 .sparc,
                 .sparc64,
                 .x86,
@@ -2699,13 +2703,17 @@ pub const DynamicLinker = struct {
             },
 
             .openbsd => switch (cpu.arch) {
+                .alpha,
                 .arm,
                 .aarch64,
+                .hppa,
                 .mips64,
                 .mips64el,
                 .powerpc,
                 .powerpc64,
                 .riscv64,
+                .sh,
+                .sheb,
                 .sparc64,
                 .x86,
                 .x86_64,