[RFC] make a test_core.pir that tests which are part of coretest use, instead of test_more.pir

[dukeleto]

Tests that are in make coretest cannot use PGE, but there is nothing enforcing this, so they end up being added and then the first poor sap that types make corevm; make coretest gets something like

# test_fetch_keyed_pmc
# test_fetch_keyed_int
# test_fetch_keyed_str
"load_bytecode" couldn't find file 'PGE.pbc'
current instr.: 'parrot;Test;More;like' pc 1662 (runtime/parrot/library/Test/More.pir:1085)
called from Sub 'test_atan' pc 1170 (t/op/inf_nan.t:224)
called from Sub 'main' pc 137 (t/op/inf_nan.t:34)
"load_bytecode" couldn't find file 'PGE.pbc'
current instr.: 'parrot;Test;More;like' pc 1662 (runtime/parrot/library/Test/More.pir:1085)
called from Sub 'test_sqrt_n_n' pc 3976 (t/op/number.t:798)
called from Sub 'main' pc 389 (t/op/number.t:62)
# test_vivify_keyed_pmc
# test_vivify_keyed_int
# test_vivify_keyed_str
"load_bytecode" couldn't find file 'PGE.pbc'
current instr.: 'parrot;Test;More;like' pc 1662 (runtime/parrot/library/Test/More.pir:1085)
called from Sub 'test_digest' pc 205 (t/dynpmc/md2.t:72)
called from Sub 'main' pc 68 (t/dynpmc/md2.t:33)
"load_bytecode" couldn't find file 'PGE.pbc'
current instr.: 'parrot;Test;More;like' pc 1662 (runtime/parrot/library/Test/More.pir:1085)
called from Sub 'test_digest' pc 205 (t/dynpmc/md4.t:72)
called from Sub 'main' pc 68 (t/dynpmc/md4.t:33)
"load_bytecode" couldn't find file 'PGE.pbc'
current instr.: 'parrot;Test;More;like' pc 1662 (runtime/parrot/library/Test/More.pir:1085)
called from Sub 'test_digest' pc 205 (t/dynpmc/md5.t:72)
called from Sub 'main' pc 68 (t/dynpmc/md5.t:33)
"load_bytecode" couldn't find file 'PGE.pbc'
current instr.: 'parrot;Test;More;like' pc 1662 (runtime/parrot/library/Test/More.pir:1085)
called from Sub 'test_digest' pc 205 (t/dynpmc/ripemd160.t:72)
called from Sub 'main' pc 68 (t/dynpmc/ripemd160.t:33)
"load_bytecode" couldn't find file 'PGE.pbc'
current instr.: 'parrot;Test;More;like' pc 1662 (runtime/parrot/library/Test/More.pir:1085)
called from Sub 'test_digest' pc 205 (t/dynpmc/sha.t:72)
called from Sub 'main' pc 68 (t/dynpmc/sha.t:33)
"load_bytecode" couldn't find file 'PGE.pbc'
current instr.: 'parrot;Test;More;like' pc 1662 (runtime/parrot/library/Test/More.pir:1085)
called from Sub 'test_digest' pc 205 (t/dynpmc/sha1.t:72)
called from Sub 'main' pc 68 (t/dynpmc/sha1.t:33)
"load_bytecode" couldn't find file 'PGE.pbc'
current instr.: 'parrot;Test;More;like' pc 1662 (runtime/parrot/library/Test/More.pir:1085)
called from Sub 'test_digest' pc 205 (t/dynpmc/sha256.t:72)
called from Sub 'main' pc 68 (t/dynpmc/sha256.t:33)
"load_bytecode" couldn't find file 'PGE.pbc'
current instr.: 'parrot;Test;More;like' pc 1662 (runtime/parrot/library/Test/More.pir:1085)
called from Sub 'test_digest' pc 205 (t/dynpmc/sha512.t:72)
called from Sub 'main' pc 68 (t/dynpmc/sha512.t:33)
# no extension recognized for t/perl/testlib/hello
# no extension recognized for t/perl/testlib/hello
# no extension recognized for t/perl/testlib/hello
make: *** [coretest] Error 1

The proposal is to have a test_core.pir which only imports the subset of function from test_more.pir that are valid for making the corevm target happy.

For reference, this is the current output of "make coretest" on trunk.