patman: Rename Color() method to build()

This method has the same name as its class which is confusing. It is also
annoying when searching the code.

It builds a string with a colour, so rename it to build().

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/patman/terminal.py b/tools/patman/terminal.py
index f76d2b1..e72c55b 100644
--- a/tools/patman/terminal.py
+++ b/tools/patman/terminal.py
@@ -64,7 +64,7 @@
         Length of text, after skipping ANSI sequences
 
     >>> col = Color(COLOR_ALWAYS)
-    >>> text = col.Color(Color.RED, 'abc')
+    >>> text = col.build(Color.RED, 'abc')
     >>> len(text)
     14
     >>> CalcAsciiLen(text)
@@ -73,7 +73,7 @@
     >>> text += 'def'
     >>> CalcAsciiLen(text)
     6
-    >>> text += col.Color(Color.RED, 'abc')
+    >>> text += col.build(Color.RED, 'abc')
     >>> CalcAsciiLen(text)
     9
     """
@@ -87,7 +87,7 @@
     calculation.
 
     >>> col = Color(COLOR_ALWAYS)
-    >>> text = col.Color(Color.RED, 'abc')
+    >>> text = col.build(Color.RED, 'abc')
     >>> len(text)
     14
     >>> CalcAsciiLen(TrimAsciiLen(text, 4))
@@ -97,7 +97,7 @@
     >>> text += 'def'
     >>> CalcAsciiLen(TrimAsciiLen(text, 4))
     4
-    >>> text += col.Color(Color.RED, 'ghi')
+    >>> text += col.build(Color.RED, 'ghi')
     >>> CalcAsciiLen(TrimAsciiLen(text, 7))
     7
     """
@@ -148,7 +148,7 @@
     else:
         if colour:
             col = Color()
-            text = col.Color(colour, text, bright=bright)
+            text = col.build(colour, text, bright=bright)
         if newline:
             print(text)
             last_print_len = None
@@ -191,7 +191,7 @@
     for line in print_test_list:
         if line.colour:
             col = Color()
-            print(col.Color(line.colour, line.text), end='')
+            print(col.build(line.colour, line.text), end='')
         else:
             print(line.text, end='')
         if line.newline:
@@ -247,7 +247,7 @@
             return self.RESET
         return ''
 
-    def Color(self, color, text, bright=True):
+    def build(self, color, text, bright=True):
         """Returns text with conditionally added color escape sequences.
 
         Keyword arguments: