corkscrew-x86: Fix build with some glibc versions

Make sure __USE_GNU is actually set before ucontext.h is included
(even implicitly).
This should fix the build inside android-build (wasn't broken locally
in the first place).

Change-Id: Ic8fba210df502c3017e53a8ca4961c4a5815df67
Signed-off-by: Bernhard Rosenkraenzer <Bernhard.Rosenkranzer@linaro.org>
core: Increase the size of variable for the uevent.<hardware>.rc file name.

    The size of hardware is 32 bytes and the tmp variable should fit
    'uevent.' and '.rc' as well. In some cases like for the ST-Ericsson
    Snowball the 32 bytes were not enouth.
    hardware = "st-ericssonsnowballplatform"

Signed-off-by: Patrik Ryd <patrik.ryd@linaro.org>
core: Increase the size of variable for the init.<hardware>.rc file name.

The size of hardware is 32 bytes and the tmp variable should fit
'init.' and '.rc' as well. In some cases like for the ST-Ericsson
Snowball the 32 bytes were not enouth.
hardware = "st-ericssonsnowballplatform"

Change-Id: I6bf8f17c45bf5ea57fbf662e98de786c22acc863
Signed-off-by: Patrik Ryd <patrik.ryd@linaro.org>