arm-eabi-4.9: change gmp version to current based on linaro's manifest

Signed-off-by: aznrice <aznrice2k4@gmail.com>
arm-eabi-4.9: change mpfr version to current based on linaro's manifest

Signed-off-by: aznrice <aznrice2k4@gmail.com>
arm-eabi-4.9: change mpc version to current based on linaro's manifest

Signed-off-by: aznrice <aznrice2k4@gmail.com>
arm-eabi-4.9: update gdb to 7.7

Signed-off-by: aznrice <aznrice2k4@gmail.com>
arm-eabi-4.9: update binutils to 2.24

Signed-off-by: aznrice <aznrice2k4@gmail.com>
arm-eabi-4.9: --disable-libsanitizer

Signed-off-by: aznrice <aznrice2k4@gmail.com>
arm-eabi-4.9: --disable-libatomic

Signed-off-by: aznrice <aznrice2k4@gmail.com>