Implement bindings for alcIsExtensionPresent #1208

Job	Run time
android	26m 5s
macos	21m 18s
air-samples (4.0.5)	3m 2s
docs	47s
air-samples (4.1.5)	3m 2s
flash-samples	36s
html5-samples	1m 23s
air-samples (4.2.5)	3m 1s
ios	16m 6s
linux	13m 56s
air-samples (4.3.1)	3m 5s
windows	13m 55s
package-haxelib	3m 31s
hashlink-samples (windows-latest)	2m 28s
hashlink-samples (ubuntu-20.04)	46s
neko-samples (3.4.7, windows-latest)	1m 4s
hashlink-samples (macos-12)	2m 42s
hashlinkc-samples (windows-latest)	1m 54s
neko-samples (3.4.7, ubuntu-20.04)	1m 51s
hashlinkc-samples (ubuntu-20.04)	3m 32s
neko-samples (3.4.7, macos-12)	1m 53s
hashlinkc-samples (macos-12)	3m 53s
neko-samples (4.2.5, windows-latest)	1m 7s
neko-samples (4.2.5, ubuntu-20.04)	2m 13s
neko-samples (4.2.5, macos-12)	2m 0s
notify	0s
	2h 15m 10s

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