Fix support for GHCJS_BROWSER compilation flag of GHC #1141

Job	Run time
fedora37	4m 26s
build (ubuntu-24.04, 9.12)	3m 23s
arm (arm32v7)	2m 34s
build (ubuntu-24.04, 9.10)	1m 39s
arm (arm64v8)	2m 21s
build (ubuntu-24.04, 9.8)	1m 32s
build (ubuntu-24.04, 9.6)	2m 44s
freebsd (self-hosted, FreeBSD, X64, 9.4)	1m 5s
i386	2m 9s
build (ubuntu-24.04, 9.4)	2m 41s
freebsd (self-hosted, FreeBSD, X64, 9.6)	1m 4s
build (ubuntu-24.04, 9.2)	1m 49s
build (ubuntu-24.04, 9.0)	2m 9s
redhat-ubi9	4m 27s
build (ubuntu-24.04, 8.10)	2m 11s
build (ubuntu-24.04, 8.8)	2m 11s
build (ubuntu-24.04, 8.6)	2m 15s
build (macOS-latest, 9.12)	4m 16s
build (macOS-latest, 9.10)	5m 30s
build (macOS-latest, 9.8)	3m 49s
build (macOS-latest, 9.6)	3m 23s
build (macOS-latest, 9.4)	3m 16s
build (macOS-latest, 9.2)	2m 36s
	1h 3m 30s

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