uclibc: do not enable DODEBUG

The DODEBUG configuration option in uClibc is broken, even for widely
used architectures like ARM. Therefore, any Buildroot configuration
that has BR2_ENABLE_DEBUG enabled and uses uClibc with the internal
toolchain backend will fail, with an error like:

  http://autobuild.buildroot.net/results/d34/d34238c209cf2ef63371a598ab9218165c90f864/build-end.log

This error was also reported recently by a Buildroot user.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/uclibc/uclibc.mk

@@ -390,14 +390,6 @@ else
 UCLIBC_WCHAR_CONFIG = $(call UCLIBC_OPT_UNSET,UCLIBC_HAS_WCHAR,$(@D))
 endif
 
-#
-# debug
-#
-
-ifeq ($(BR2_ENABLE_DEBUG),y)
-UCLIBC_DEBUG_CONFIG = $(call UCLIBC_OPT_SET,DODEBUG,y,$(@D))
-endif
-
 #
 # strip
 #
@@ -448,7 +440,6 @@ define UCLIBC_SETUP_DOT_CONFIG
 	$(UCLIBC_LOCALE_CONFIG)
 	$(UCLIBC_WCHAR_CONFIG)
 	$(UCLIBC_STRIP_CONFIG)
-	$(UCLIBC_DEBUG_CONFIG)
 	yes "" | $(MAKE1) -C $(@D) \
 		$(UCLIBC_MAKE_FLAGS) \
 		PREFIX=$(STAGING_DIR) \