Revert "Remove arch loops from build scripts. (#889)"

This reverts commit 7ed329c11f.

AMBuildScript

@@ -639,40 +639,32 @@ for arch in SM.archs:
      SP.libsourcepawn[arch]
   ]
 
-NonSDKBuilds = [
+BuildScripts = [
+  'loader/AMBuilder',
+  'core/AMBuilder',
   'core/logic/AMBuilder',
   'extensions/bintools/AMBuilder',
   'extensions/clientprefs/AMBuilder',
   'extensions/curl/AMBuilder',
-  'extensions/geoip/AMBuilder',
-  'extensions/regex/AMBuilder',
-  'extensions/sqlite/AMBuilder',
-  'extensions/topmenus/AMBuilder',
-  'extensions/updater/AMBuilder',
-  'loader/AMBuilder',
-]
-if SM.mysql_root:
-  NonSDKBuilds += [
-    'extensions/mysql/AMBuilder',
-  ]
-for arch in SM.archs:
-  builder.Build(NonSDKBuilds, { 'SM': SM, 'arch': arch })
-
-SDKBuilds = [
-  'core/AMBuilder',
   'extensions/cstrike/AMBuilder',
+  'extensions/geoip/AMBuilder',
+  'extensions/mysql/AMBuilder',
+  'extensions/regex/AMBuilder',
   'extensions/sdkhooks/AMBuilder',
   'extensions/sdktools/AMBuilder',
+  'extensions/sqlite/AMBuilder',
   'extensions/tf2/AMBuilder',
+  'extensions/topmenus/AMBuilder',
+  'extensions/updater/AMBuilder',
 ]
-builder.Build(SDKBuilds, { 'SM': SM })
 
 if builder.backend == 'amb2':
-  OtherScripts = [
+  BuildScripts += [
     'plugins/AMBuilder',
     'tools/buildbot/PackageScript',
   ]
-  builder.Build(OtherScripts, { 'SM': SM })
+
+builder.Build(BuildScripts, { 'SM': SM })
 
 if builder.options.breakpad_dump:
   builder.Build('tools/buildbot/BreakpadSymbols', { 'SM': SM })