Fixed build issue for custom target

Author: Sergej Jovanovic

builder.py

@@ -318,7 +318,7 @@ def getTargetGnPath(cls, target):
     #Check if target is defined in userdef.py availableTargetsForBuilding. If not, returns target name as 
     # gn path and 0 for combininglibs flag. In that case check is performed also in config.py TARGETS_TO_BUILD
     targetsToBuild, shouldCombineLibs, shouldCopyToOutput = Settings.availableTargetsForBuilding.get(target,([target],0,1))
-    if targetsToBuild == target and shouldCombineLibs == 0:
+    if target in targetsToBuild and shouldCombineLibs == 0:
       targetsToBuild, shouldCombineLibs, shouldCopyToOutput = config.TARGETS_TO_BUILD.get(target,([target],0,1))
 
     return targetsToBuild, shouldCombineLibs, shouldCopyToOutput

config.py

@@ -218,7 +218,8 @@
                         '/obj',
                         '/gen',
                         '/uwp_x86',
-                        '/uwp_x64'
+                        '/uwp_x64',
+                        '/uwp_arm'
                       )
 
 COMBINE_LIB_IGNORE_SUBFOLDERS = (