[analyzer][NFC] Fix comparison to True/False (#94038)

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.

Co-authored-by: Eisuke Kawashima <[email protected]>

Author: e-kwsm

clang/tools/scan-build/bin/set-xcode-analyzer

@@ -107,7 +107,7 @@ def main():
     foundSpec = True
     ModifySpec(x, isBuiltinAnalyzer, path)
 
-  if foundSpec == False:
+  if not foundSpec:
       print "(-) No compiler configuration file was found.  Xcode's analyzer has not been updated."
 
 if __name__ == '__main__':

clang/utils/check_cfc/check_cfc.py

@@ -156,7 +156,7 @@ def get_output_file(args):
         elif arg.startswith("-o"):
             # Specified conjoined with -o
             return arg[2:]
-    assert grabnext == False
+    assert not grabnext
 
     return None
 
@@ -182,7 +182,7 @@ def replace_output_file(args, new_name):
     if replaceidx is None:
         raise Exception
     replacement = new_name
-    if attached == True:
+    if attached:
         replacement = "-o" + new_name
     args[replaceidx] = replacement
     return args