Fix link order in cosmopolitan.a

It turned out that the linker was doing the wrong with the amalgamation
library concerning weak stubs. A regression test has been added and new
binaries have been uploaded to https://justine.lol/cosmopolitan/

Ideally this should be fixed by building a tool that turns multiple .a
files into a single .a file with deduplication. As a workaround for now
the cosmopolitan.a build is restructured to not include LIBC_STUBS which
meant technical debt needed to be paid off where non-stub interfaces
were moved to LIBC_INTRIN and LIBC_NEXGEN32E.

Thank @PerfectProductions in #31 for the report!

tool/build/package.c

@@ -235,6 +235,8 @@ void GetOpts(struct Package *pkg, struct Packages *deps, int argc,
       case 'd':
         AddDependency(deps, optarg);
         break;
+      case 'h':
+        exit(0);
       default:
         fprintf(stderr, "%s: %s [%s %s] [%s %s] %s\n", "Usage",
                 program_invocation_name, "-o", "OUTPACKAGE", "-d", "DEPPACKAGE",