Makefile.defs: version set to 5.2.0

- new major release, first in 5.2.x series, built from git branch 5.2

src/Makefile.defs

@@ -107,7 +107,7 @@ INSTALL_FLAVOUR=$(FLAVOUR)
 VERSION = 5
 PATCHLEVEL = 2
 SUBLEVEL =  0
-EXTRAVERSION = -rc2
+EXTRAVERSION = 
 
 # memory manager switcher
 # 0 - f_malloc (fast malloc)