Build PHARs

Generic/DuplicateClassName: 4 bug fixes + performance improvement #1305

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Run time

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Job	Run time
Build Phar on PHP: 5.4	43s
Build Phar on PHP: 5.5	39s
Build Phar on PHP: 5.6	30s
Build Phar on PHP: 7.0	28s
Build Phar on PHP: 7.1	22s
Build Phar on PHP: 7.2	23s
Build Phar on PHP: 7.3	25s
Build Phar on PHP: 7.4	23s
Build Phar on PHP: 8.1	22s
Build Phar on PHP: 8.2	21s
Build Phar on PHP: 8.3	22s
Build Phar on PHP: 8.4	20s
	5m 18s