stage2: add some missing deallocations in Compilation.zig
stage2: add some missing deallocations in Compilation.zig

zig-lang/zig,andrewrk/zig,raulgrell/zig,raulgrell/zig,zig-lang/zig,zig-lang/zig,andrewrk/zig,raulgrell/zig,raulgrell/zig,raulgrell/zig