fix(compiler-rt/**.py): fix comparison to None

from PEP8 (https://peps.python.org/pep-0008/#programming-recommendations):

> Comparisons to singletons like None should always be done with is or
> is not, never the equality operators.

compiler-rt/test/asan/lit.cfg.py

@@ -10,7 +10,7 @@
 
 def get_required_attr(config, attr_name):
     attr_value = getattr(config, attr_name, None)
-    if attr_value == None:
+    if attr_value is None:
         lit_config.fatal(
             "No attribute %r in test configuration! You may need to run "
             "tests from your build directory or add this attribute "

compiler-rt/test/builtins/Unit/lit.cfg.py

@@ -21,7 +21,7 @@
 
 def get_required_attr(config, attr_name):
     attr_value = getattr(config, attr_name, None)
-    if attr_value == None:
+    if attr_value is None:
         lit_config.fatal(
             "No attribute %r in test configuration! You may need to run "
             "tests from your build directory or add this attribute "

compiler-rt/test/ctx_profile/lit.cfg.py

@@ -13,7 +13,7 @@
 
 def get_required_attr(config, attr_name):
     attr_value = getattr(config, attr_name, None)
-    if attr_value == None:
+    if attr_value is None:
         lit_config.fatal(
             "No attribute %r in test configuration! You may need to run "
             "tests from your build directory or add this attribute "

compiler-rt/test/lsan/lit.common.cfg.py

@@ -10,7 +10,7 @@
 
 def get_required_attr(config, attr_name):
     attr_value = getattr(config, attr_name, None)
-    if attr_value == None:
+    if attr_value is None:
         lit_config.fatal(
             "No attribute %r in test configuration! You may need to run "
             "tests from your build directory or add this attribute "

compiler-rt/test/memprof/lit.cfg.py

@@ -9,7 +9,7 @@
 
 def get_required_attr(config, attr_name):
     attr_value = getattr(config, attr_name, None)
-    if attr_value == None:
+    if attr_value is None:
         lit_config.fatal(
             "No attribute %r in test configuration! You may need to run "
             "tests from your build directory or add this attribute "

compiler-rt/test/profile/lit.cfg.py

@@ -6,7 +6,7 @@
 
 def get_required_attr(config, attr_name):
     attr_value = getattr(config, attr_name, None)
-    if attr_value == None:
+    if attr_value is None:
         lit_config.fatal(
             "No attribute %r in test configuration! You may need to run "
             "tests from your build directory or add this attribute "

compiler-rt/test/sanitizer_common/android_commands/android_compile.py

@@ -20,7 +20,7 @@
     elif arg == "-o":
         output = args.pop(0)
 
-if output == None:
+if output is None:
     print("No output file name!")
     sys.exit(1)
 

compiler-rt/test/sanitizer_common/ios_commands/iossim_compile.py

@@ -19,7 +19,7 @@
     elif arg == "-o":
         output = args.pop(0)
 
-if output == None:
+if output is None:
     print("No output file name!")
     sys.exit(1)
 

compiler-rt/test/ubsan/lit.common.cfg.py

@@ -5,7 +5,7 @@
 
 def get_required_attr(config, attr_name):
     attr_value = getattr(config, attr_name, None)
-    if attr_value == None:
+    if attr_value is None:
         lit_config.fatal(
             "No attribute %r in test configuration! You may need to run "
             "tests from your build directory or add this attribute "

compiler-rt/test/ubsan_minimal/lit.common.cfg.py

@@ -5,7 +5,7 @@
 
 def get_required_attr(config, attr_name):
     attr_value = getattr(config, attr_name, None)
-    if attr_value == None:
+    if attr_value is None:
         lit_config.fatal(
             "No attribute %r in test configuration! You may need to run "
             "tests from your build directory or add this attribute "