Bump version for v5.0.2 release

bot:notacherrypick

Signed-off-by: Wenduo Wang <[email protected]>

Author: wenduwan

VERSION

@@ -41,7 +41,7 @@ flex_min_version=2.5.4
 # requirement is that it must be entirely printable ASCII characters
 # and have no white space.
 
-greek=rc2
+greek=
 
 # If repo_rev is empty, then the repository version number will be
 # obtained during "make dist" via the "git describe --tags --always"