toolchain/gcc: upgrade Linaro GCC 4.9 to 4.9-2015.03

toolchain/gcc/common.mk

toolchain/gcc/patches/4.9-linaro/010-documentation.patch

toolchain/gcc/patches/4.9-linaro/200-musl_config.patch

toolchain/gcc/patches/4.9-linaro/202-musl_mips.patch

toolchain/gcc/patches/4.9-linaro/203-musl_powerpc.patch

toolchain/gcc/patches/4.9-linaro/204-musl_sh.patch

toolchain/gcc/patches/4.9-linaro/205-musl_x86.patch

toolchain/gcc/patches/4.9-linaro/209-musl_libstdc++.patch

...hain/gcc/patches/4.9-linaro/220-musl_mips_softfloat.patch

toolchain/gcc/patches/4.9-linaro/221-musl_mips64.patch

...in/gcc/patches/4.9-linaro/800-arm_v5te_no_ldrd_strd.patch

toolchain/gcc/patches/4.9-linaro/870-ppc_no_crtsavres.patch

toolchain/gcc/patches/4.9-linaro/910-mbsd_multi.patch

...in/gcc/patches/4.9-linaro/920-specs_nonfatal_getenv.patch

...ain/gcc/patches/4.9-linaro/930-fix-mips-noexecstack.patch

...in/gcc/patches/4.9-linaro/940-no-clobber-stamp-bits.patch