t/op/exec.t: Skip a test under -DUSE_SHELL_ALWAYS
t/lib/warnings/9uninit: Skip two tests under -DUSE_SHELL_ALWAYS
t/io/pipe.t: Skip test under -DUSE_SHELL_ALWAYS
ext/IPC-Open3/t/IPC-Open3.t: TODO a test under -DUSE_SHELL_ALWAYS
perlport: warn that exec+USE_SHELL_ALWAYS may not behave as expected
Net::Domain: Stop domainname() from giving out warnings in android
Perl::OStype: Report Android as a Unix-like OS.
Sys::Syslog: handle getprotobyn{ame,umber} not being available
cpan/Socket/Socket.pm: Protect against getprotobyname() not being available
cpan/IO-Compress/t/050interop-gzip.t: Call gzip with "-d -c" instead of "-dc" on Android
cpan/autodie/t/open.t: Work around android only having a built-in true
Configure: Minor tweak to allow cross-compiling with g++