bitbake: bitbake-user-manual: fix bad links

The link errors were found with linkcheck command:

(line 1958) broken    https://docs.python.org/3/library/re.html#re - Anchor 're' not found
(line  713) broken    http://docs.python.org/3/library/re.html#re - Anchor 're' not found

(Bitbake rev: 29081375659e3dcf1c578cd98ab2c8a2e9f07ca8)

Signed-off-by: Nicolas Dechesne <nicolas.dechesne@linaro.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/doc/bitbake-user-manual/bitbake-user-manual-metadata.rst

@@ -1962,7 +1962,7 @@ Other variables or names support Python's
 `glob <https://docs.python.org/3/library/glob.html>`_ syntax,
 `fnmatch <https://docs.python.org/3/library/fnmatch.html#module-fnmatch>`_
 syntax, or
-`Regular Expression (re) <https://docs.python.org/3/library/re.html#re>`_
+`Regular Expression (re) <https://docs.python.org/3/library/re.html>`_
 syntax.
 
 For variables that have wildcard suport, the documentation describes

bitbake/doc/bitbake-user-manual/bitbake-user-manual-ref-variables.rst

@@ -714,7 +714,7 @@ overview of their function and contents.
       compiler. Consequently, the syntax follows Python's Regular
       Expression (re) syntax. The expressions are compared against the full
       paths to the files. For complete syntax information, see Python's
-      documentation at http://docs.python.org/3/library/re.html#re.
+      documentation at http://docs.python.org/3/library/re.html.
 
       The following example uses a complete regular expression to tell
       BitBake to ignore all recipe and recipe append files in the