scripts: emit enum parameters in API build description

Currently the information about enums in the API document lacks any
mention of parameters, so it is impossible to tell what kind of enum
declaration is present in the libvirt API header. With this change

  <macro name='LIBVIR_CHECK_VERSION' file='libvirt-common'>
  <macro name='VIR_COPY_CPUMAP' file='libvirt-domain'>
  ...snip...

becomes

  <macro name='LIBVIR_CHECK_VERSION' file='libvirt-common' params='major,minor,micro'>
  <macro name='VIR_COPY_CPUMAP' file='libvirt-domain' params='cpumaps,maplen,vcpu,cpumap'>
  ...snip...
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>
Signed-off-by: NDaniel P. Berrangé <berrange@redhat.com>

scripts/apibuild.py

@@ -1013,10 +1013,12 @@ class CParser:
                        token[1][0] != '#'):
                     lst.append(token[1])
                     token = self.lexer.token()
-                try:
-                    name = name.split('(')[0]
-                except Exception:
-                    pass
+
+                paramStart = name.find("(")
+                params = None
+                if paramStart != -1:
+                    params = name[paramStart+1:-1]
+                    name = name[0:paramStart]
 
                 # skip hidden macros
                 if name in hidden_macros:
@@ -1029,7 +1031,7 @@ class CParser:
                     strValue = lst[0][1:-1]
                 (args, desc) = self.parseMacroComment(name, not self.is_header)
                 self.index_add(name, self.filename, not self.is_header,
-                               "macro", (args, desc, strValue))
+                               "macro", (args, desc, params, strValue))
                 return token
 
         #
@@ -2174,10 +2176,13 @@ class docBuilder:
         if id.info is None:
             args = []
             desc = None
+            params = None
             strValue = None
         else:
-            (args, desc, strValue) = id.info
+            (args, desc, params, strValue) = id.info
 
+        if params is not None:
+            output.write(" params='%s'" % params)
         if strValue is not None:
             output.write(" string='%s'" % strValue)
         output.write(">\n")