Remove arch loops from build scripts. (#889)

This simplifies non-sdk build scripts by removing their loops over SM.archs. Instead the top-level
build script will re-evaluate them for each architecture.

extensions/sqlite/AMBuilder

@@ -1,34 +1,32 @@
 # vim: set sts=2 ts=8 sw=2 tw=99 et ft=python:
 import os
 
-for arch in SM.archs:
-  binary = SM.ExtLibrary(builder, 'dbi.sqlite.ext', arch)
-  binary.compiler.cxxincludes += [
-    os.path.join(SM.mms_root, 'core', 'sourcehook'),
-  ]
-  if binary.compiler.family == 'gcc' or binary.compiler.family == 'clang':
-    binary.compiler.cxxflags += ['-fno-rtti']
-  elif binary.compiler.family == 'msvc':
-    binary.compiler.cxxflags += ['/GR-']
+binary = SM.ExtLibrary(builder, 'dbi.sqlite.ext', arch)
+binary.compiler.cxxincludes += [
+  os.path.join(SM.mms_root, 'core', 'sourcehook'),
+]
+if binary.compiler.family == 'gcc' or binary.compiler.family == 'clang':
+  binary.compiler.cxxflags += ['-fno-rtti']
+elif binary.compiler.family == 'msvc':
+  binary.compiler.cxxflags += ['/GR-']
 
-  binary.compiler.defines += [
-    'SQLITE_OMIT_LOAD_EXTENSION',
-    'SQLITE_THREADSAFE',
-    'SQLITE_USE_URI',
-    'SQLITE_ALLOW_URI_AUTHORITY',
-  ]
-  if builder.target.platform == 'linux':
-    binary.compiler.postlink += ['-ldl', '-lpthread']
+binary.compiler.defines += [
+  'SQLITE_OMIT_LOAD_EXTENSION',
+  'SQLITE_THREADSAFE',
+  'SQLITE_USE_URI',
+  'SQLITE_ALLOW_URI_AUTHORITY',
+]
+if builder.target.platform == 'linux':
+  binary.compiler.postlink += ['-ldl', '-lpthread']
 
-  binary.sources += [
-    '../../public/smsdk_ext.cpp',
-    'extension.cpp',
-    'driver/SqDatabase.cpp',
-    'driver/SqDriver.cpp',
-    'driver/SqQuery.cpp',
-    'driver/SqResults.cpp',
-    'sqlite-source/sqlite3.c'
-  ]
-
-  SM.extensions += [builder.Add(binary)]
+binary.sources += [
+  '../../public/smsdk_ext.cpp',
+  'extension.cpp',
+  'driver/SqDatabase.cpp',
+  'driver/SqDriver.cpp',
+  'driver/SqQuery.cpp',
+  'driver/SqResults.cpp',
+  'sqlite-source/sqlite3.c'
+]
 
+SM.extensions += [builder.Add(binary)]