macos: Enable all working tests
macos: Enable all working tests

all except the below work now on MacOS, also as executable test,
not just with -run:
* dlltest - we don't support dylib generation (yet)
* memtest - tccmacho.c contains some leaks
* asm-c-connect-test - some confusion with underscores still

mirror/tinycc,mirror/tinycc,mirror/tinycc,mingodad/tinycc,mirror/tinycc,mingodad/tinycc,mingodad/tinycc,mingodad/tinycc