[php84] php74, php80 : pear - backport libxml2 >=2.13 fix

[Bjarne D Mathiesen]

variant : pear - enable pear support ; fix for libxml >=2.13

php/php-src#14834
Error installing PHP when --with-pear is used macports#14834

php/php-src at 67259e4
Fix macportsGH-14834: Error installing PHP when --with-pear is used

Changes to be committed:
	modified:   lang/php/Portfile
	new file:   lang/php/files/ext-xml-tests-gh14834.phpt
	new file:   lang/php/files/patch-php74-ext-xml-compat.c.diff
	new file:   lang/php/files/patch-php80-ext-xml-compat.c.diff

-- 
Bjarne D Mathiesen
Slagelse ; Danmark ; Europa
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