bump version to 0.9.31-rc1

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

Rules.mak

@@ -105,8 +105,8 @@ export RUNTIME_PREFIX DEVEL_PREFIX KERNEL_HEADERS MULTILIB_DIR
 # Now config hard core
 MAJOR_VERSION := 0
 MINOR_VERSION := 9
-SUBLEVEL      := 30
+SUBLEVEL      := 31
-EXTRAVERSION  :=-git
+EXTRAVERSION  :=-rc1
 VERSION       := $(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL)
 ifneq ($(EXTRAVERSION),)
 VERSION       := $(VERSION)$(EXTRAVERSION)