games/punchy: unbreak build on armv7

Fix files/patch-v8 to compile on armv7 by refactoring it to use
ELF auxilliary vectors in the CPU detection code and by adding
some missing includes.

cargo-crates/v8-0.47.1/third_party/zlib/cpu_features.c:137:20: warning: implicit
declaration of function 'READ_SPECIALREG' is invalid in C99
[-Wimplicit-function-declaration]
    id_aa64isar0 = READ_SPECIALREG(id_aa64isar0_el1);
                   ^
cargo-crates/v8-0.47.1/third_party/zlib/cpu_features.c:137:36: error: use of
undeclared identifier 'id_aa64isar0_el1'; did you mean 'id_aa64isar0'?
    id_aa64isar0 = READ_SPECIALREG(id_aa64isar0_el1);
                                   ^~~~~~~~~~~~~~~~
                                   id_aa64isar0
cargo-crates/v8-0.47.1/third_party/zlib/cpu_features.c:136:14: note:
'id_aa64isar0' declared here
    uint64_t id_aa64isar0;