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.

loader/AMBuilder

@@ -1,31 +1,30 @@
 # vim: set sts=2 ts=8 sw=2 tw=99 et ft=python:
 import os.path
 
-for arch in SM.archs:
-  if builder.target.platform in ['windows', 'mac']:
-    name = 'sourcemod_mm'
-    extra_ldflags = []
-  elif builder.target.platform == 'linux':
-    name = 'sourcemod_mm_i486'
-    extra_ldflags = ['-ldl']
+if builder.target.platform in ['windows', 'mac']:
+  name = 'sourcemod_mm'
+  extra_ldflags = []
+elif builder.target.platform == 'linux':
+  name = 'sourcemod_mm_i486'
+  extra_ldflags = ['-ldl']
 
-  if arch == 'x64':
-    name = 'sourcemod_mm.x64'
+if arch == 'x64':
+  name = 'sourcemod_mm.x64'
 
-  binary = SM.Library(builder, name, arch)
-  binary.compiler.cxxincludes += [
-    os.path.join(SM.mms_root, 'core'),
-    os.path.join(SM.mms_root, 'sourcehook')
-  ]
-  binary.compiler.defines += ['META_NO_HL2SDK']
-  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.linkflags += extra_ldflags
-  binary.sources = [
-    'loader.cpp'
-  ]
+binary = SM.Library(builder, name, arch)
+binary.compiler.cxxincludes += [
+  os.path.join(SM.mms_root, 'core'),
+  os.path.join(SM.mms_root, 'sourcehook')
+]
+binary.compiler.defines += ['META_NO_HL2SDK']
+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.linkflags += extra_ldflags
+binary.sources = [
+  'loader.cpp'
+]
 
-  nodes = builder.Add(binary)
-  SM.binaries += [nodes]
+nodes = builder.Add(binary)
+SM.binaries += [nodes]