drop 4.5 support

toolchain/gcc/Config.in

toolchain/gcc/Config.version

toolchain/gcc/common.mk

toolchain/gcc/patches/4.5-linaro/010-documentation.patch

toolchain/gcc/patches/4.5-linaro/100-uclibc-conf.patch

toolchain/gcc/patches/4.5-linaro/200-musl.patch

...c/patches/4.5-linaro/200-ppc_include_config_linux_h.patch

...chain/gcc/patches/4.5-linaro/301-missing-execinfo_h.patch

toolchain/gcc/patches/4.5-linaro/302-c99-snprintf.patch

.../gcc/patches/4.5-linaro/305-libmudflap-susv3-legacy.patch

...ain/gcc/patches/4.5-linaro/810-arm-softfloat-libgcc.patch

toolchain/gcc/patches/4.5-linaro/820-libgcc_pic.patch

...chain/gcc/patches/4.5-linaro/830-arm_unbreak_armv4t.patch

...cc/patches/4.5-linaro/840-armv4_pass_fix-v4bx_to_ld.patch

toolchain/gcc/patches/4.5-linaro/850-use_shared_libgcc.patch

toolchain/gcc/patches/4.5-linaro/910-mbsd_multi.patch

...in/gcc/patches/4.5-linaro/920-specs_nonfatal_getenv.patch

...tches/4.5-linaro/993-arm_insn-opinit-RTX_CODE-fixup.patch

toolchain/gcc/patches/4.5-linaro/995-fa526.patch

toolchain/gcc/patches/4.5-linaro/999-coldfire.patch