flags: Correctly deal with symbolic flags in algebraics #276

Job	Run time
Build Color DM32 Simulator (Linux)	5m 15s
Build Simulator (Linux)	3m 27s
Build Simulator (macOS)	4m 28s
Build DM32 Firmware	4m 8s
Build WebAssembly	3m 25s
Build Simulator (Windows)	5m 43s
Build Android App (db48x)	5m 36s
Build Color DM32 Simulator (Windows)	6m 9s
Build Android App (db50x)	5m 1s
Build Color DM32 Simulator (macOS)	3m 12s
Build DM42n Firmware	3m 50s
Build DM42 Firmware	4m 4s
Create Release Package	50s
Create Release and Upload Assets	0s
	55m 8s

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