compiler_rt: Add hexagon builtins (#22029)

Signed-off-by: Brian Cain <[email protected]>
Signed-off-by: Brian Cain <[email protected]>
Co-authored-by: Alex Rønne Petersen <[email protected]>

Author: androm3da

lib/compiler_rt.zig

@@ -220,6 +220,7 @@ comptime {
     _ = @import("compiler_rt/aulldiv.zig");
     _ = @import("compiler_rt/aullrem.zig");
     _ = @import("compiler_rt/clear_cache.zig");
+    _ = @import("compiler_rt/hexagon.zig");
 
     if (@import("builtin").object_format != .c) {
         _ = @import("compiler_rt/atomics.zig");