Fix some libc version checks

[TibboddiT]

Fix usages of std.c.versionCheck, where .linux os tag should also be checked against android libc version.

closes #24460

[alexrp]

LGTM other than the style nit above.

[TibboddiT]

@alexrp I was rechecking changes and this one doesn't seem correct:

--- a/lib/std/posix.zig
+++ b/lib/std/posix.zig
@@ -610,8 +610,8 @@ pub fn getrandom(buffer: []u8) GetRandomError!void {
     if (@TypeOf(system.getrandom) != void) {
         var buf = buffer;
         const use_c = native_os != .linux or
-            (!builtin.abi.isAndroid() and std.c.versionCheck(std.SemanticVersion{ .major = 2, .minor = 25, .patch = 0 })) or
-            (builtin.abi.isAndroid() and std.c.versionCheck(std.SemanticVersion{ .major = 28, .minor = 0, .patch = 0 }));
+            (builtin.abi.isAndroid() and std.c.versionCheck(.{ .major = 28, .minor = 0, .patch = 0 })) or
+            std.c.versionCheck(.{ .major = 2, .minor = 25, .patch = 0 });
 
         while (buf.len != 0) {
             const num_read: usize, const err = if (use_c) res: {

If we are on android 24, use_c will be true, but getrandom will not be available.
I confess I just clicked "Commit suggestion" on your first suggested change, sorry about that.

Next commit will fix the check, but maybe you should disable auto-merge for now ?

[alexrp]

Oh, you're right of course, that was a silly suggestion.

That std.c.checkVersion function really needs an overhaul so that you have to explicitly pass the version of each relevant libc in a struct or something. But that's a problem for another day.