toolchain: get rid of gcc kconfig symbol overloading

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36355 3c298f89-4303-0410-b956-a3cf2f4a3e73
toolchain: get rid of uclibc version kconfig symbol overloading

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36356 3c298f89-4303-0410-b956-a3cf2f4a3e73
toolchain: get rid of eglibc version kconfig symbol overloading

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36358 3c298f89-4303-0410-b956-a3cf2f4a3e73
toolchain: get rid of musl version kconfig symbol overloading

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36359 3c298f89-4303-0410-b956-a3cf2f4a3e73
toolchain: get rid of libc implementation symbol overloading

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36360 3c298f89-4303-0410-b956-a3cf2f4a3e73
build: add new menuconfig code based on linux 3.9

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@36361 3c298f89-4303-0410-b956-a3cf2f4a3e73