glibc: move version handling to Config.in

Like we do elsewhere. No functional change, but nicer and easier to keep in
sync.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/glibc/Config.in

@@ -32,3 +32,10 @@ config BR2_GLIBC_VERSION_2_19
 endchoice
 
 endif
+
+config BR2_GLIBC_VERSION_STRING
+	string
+	default "2.18-svnr23787" if BR2_EGLIBC_VERSION_2_18
+	default "2.19-svnr25243" if BR2_EGLIBC_VERSION_2_19
+	default "2.18" if BR2_GLIBC_VERSION_2_18
+	default "2.19" if BR2_GLIBC_VERSION_2_19

package/glibc/glibc.mk

@@ -16,6 +16,7 @@ GLIBC_SOURCE = glibc-$(GLIBC_VERSION).tar.xz
 GLIBC_SRC_SUBDIR = .
 endif
 
+GLIBC_VERSION = $(call qstrip,$(BR2_GLIBC_VERSION_STRING))
 GLIBC_LICENSE = GPLv2+ (programs), LGPLv2.1+, BSD-3c, MIT (library)
 GLIBC_LICENSE_FILES = $(addprefix $(GLIBC_SRC_SUBDIR)/,COPYING COPYING.LIB LICENSES)