math/p5-Math-Pari: mark broken for Perl 5.42+

../src/kernel/none/level1.h:178:1: error: redefinition of 'evallg'

	  178 | evallg(long x)
	      | ^

../src/kernel/none/level1.h:178:1: note: previous definition is here

	  178 | evallg(long x)

PR: 288020