bitbake: bb/fetch2/wget.py: latest_versionstring escape packagename when built regex

When built package regex for use in searching upstream version in sites,
the package name need to be escaped to avoid usage of special regex
char.

For example when search for gtk+, '+' need to be escaped.

(Bitbake rev: 1aa1de4b0c5bd34466e04844bbc371933736be59)

Signed-off-by: Aníbal Limón <anibal.limon@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/fetch2/wget.py

@@ -328,7 +328,7 @@ class Wget(FetchMethod):
         if version:
             package_custom_regex_comp = re.compile(
                 "(?P<name>%s)(?P<ver>%s)(?P<arch>%s)?[\.\-](?P<type>%s)$" %
-                (version[0], pver_regex, parch_regex, psuffix_regex))
+                (re.escape(version[0]), pver_regex, parch_regex, psuffix_regex))
 
         return package_custom_regex_comp