Stop fetching emscripten and binaryen tags the old way (#262)

We now have versioning directly here in this repo for emscripten-releases. This PR makes us stop looking for tags the old way, which looked on github for tags.

Rename the files legacy-*.

emsdk

@@ -1744,44 +1744,6 @@ def fetch_emscripten_tags():
   git = GIT(must_succeed=False)
 
   if git:
-    print('Fetching all tags from Emscripten Github repository...')
-    tags = run_get_output([git, 'ls-remote', '--tags', emscripten_git_repo])
-    if tags[0] != 0: return False # failed to get tags?
-    tags = tags[1]
-    all_tags = []
-    for t in tags.split('\n'):
-      try:
-        t = t[t.index('refs/tags/') + len('refs/tags/'):].strip()
-        if version_key(t) >= version_key('1.28.2'):
-          all_tags += [t]
-      except:
-        pass
-    all_tags = sorted(all_tags, key=version_key)
-    open(sdk_path('emscripten-tags.txt'), 'w').write('\n'.join(all_tags))
-    if len(all_tags) > 0:
-      print('Done. ' + str(len(all_tags)) + ' tagged releases available, latest is ' + all_tags[-1] + '.')
-    else:
-      print('Done. No tagged releases available.')
-
-    print('Fetching all tags from Binaryen Github repository...')
-    tags = run_get_output([git, 'ls-remote', '--tags', binaryen_git_repo])
-    if tags[0] != 0: return False # failed to get tags?
-    tags = tags[1]
-    binaryen_tags = []
-    for t in tags.split('\n'):
-      try:
-        t = t[t.index('refs/tags/') + len('refs/tags/'):].strip()
-        if '.' in t:
-          binaryen_tags += [t]
-      except:
-        pass
-    binaryen_tags = sorted(binaryen_tags, key=version_key)
-    open(sdk_path('binaryen-tags.txt'), 'w').write('\n'.join(binaryen_tags))
-    if len(binaryen_tags) > 0:
-      print('Done. ' + str(len(binaryen_tags)) + ' tagged Binaryen releases available, latest is ' + binaryen_tags[-1] + '.')
-    else:
-      print('Done. No tagged Binaryen releases available.')
-
     print('Fetching emscripten-releases repository...')
     emscripten_releases_tot = get_emscripten_releases_tot()
     if emscripten_releases_tot:
@@ -1833,17 +1795,17 @@ def update_emsdk():
   fetch_emscripten_tags()
 
 
-# Lists all tagged versions directly in the Git repositories. These we can pull and compile from source.
+# Lists all legacy (pre-emscripten-releases) tagged versions directly in the Git repositories. These we can pull and compile from source.
-def load_emscripten_tags():
+def load_legacy_emscripten_tags():
   try:
-    return open(sdk_path('emscripten-tags.txt'), 'r').read().split('\n')
+    return open(sdk_path('legacy-emscripten-tags.txt'), 'r').read().split('\n')
   except:
     return []
 
 
-def load_binaryen_tags():
+def load_legacy_binaryen_tags():
   try:
-    return open(sdk_path('binaryen-tags.txt'), 'r').read().split('\n')
+    return open(sdk_path('legacy-binaryen-tags.txt'), 'r').read().split('\n')
   except:
     return []
 
@@ -1931,11 +1893,11 @@ def load_sdk_manifest():
     print(str(e))
     return
 
-  emscripten_tags = load_emscripten_tags()
+  emscripten_tags = load_legacy_emscripten_tags()
   llvm_precompiled_tags_32bit = list(reversed(load_llvm_precompiled_tags_32bit()))
   llvm_precompiled_tags_64bit = list(reversed(load_llvm_precompiled_tags_64bit()))
   llvm_precompiled_tags = llvm_precompiled_tags_32bit + llvm_precompiled_tags_64bit
-  binaryen_tags = load_binaryen_tags()
+  binaryen_tags = load_legacy_binaryen_tags()
   llvm_32bit_nightlies = list(reversed(load_llvm_32bit_nightlies()))
   llvm_64bit_nightlies = list(reversed(load_llvm_64bit_nightlies()))
   emscripten_nightlies = list(reversed(load_emscripten_nightlies()))