Bug 1480457 - Address moz.build failures for mingw-clang r=aklotz

--HG--
extra : amend_source : 61f7bfdd7b827d6fd12c16c8ed7cd3c00f5bf09e

mozglue/tests/interceptor/moz.build

@@ -16,7 +16,7 @@ OS_LIBS += [
     'ole32',
 ]
 
-if CONFIG['OS_TARGET'] == 'WINNT' and CONFIG['CC_TYPE'] == 'gcc':
+if CONFIG['OS_TARGET'] == 'WINNT' and CONFIG['CC_TYPE'] in ('gcc', 'clang'):
     # This allows us to use wmain as the entry point on mingw
     LDFLAGS += [
         '-municode',

toolkit/library/moz.build

@@ -312,6 +312,7 @@ if CONFIG['OS_ARCH'] == 'WINNT':
         'locationapi',
         'sapi',
         'dxguid',
+        'dhcpcsvc',
     ]
     if CONFIG['ACCESSIBILITY']:
         OS_LIBS += [