[Issue 12932] Support @nogc for immediately iterated array literal

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=12932

--- Comment #4 from bearophile_hugs at eml.cc ---
Currently this gets rejected, is this right?

void main() @nogc {
    foreach (       a; [[1]]) {}
    foreach (int[1] a; [[1]]) {}
}


test.d(2): Error: array literal in @nogc function main may cause GC allocation
test.d(3): Error: array literal in @nogc function main may cause GC allocation

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