main/perl-inline: fix license, modernize

- Fix wrong license
- use $() instead of backticks ``

main/perl-inline/APKBUILD

@@ -3,11 +3,11 @@
 pkgname=perl-inline
 _pkgname=Inline
 pkgver=0.83
-pkgrel=0
+pkgrel=1
 pkgdesc="Write Perl subroutines in other programming languages"
 url="http://search.cpan.org/~ingy/Inline/"
 arch="noarch"
-license="Artistic-1.0-Perl"
+license="Artistic-1.0-Perl GPL-1.0-or-later"
 depends="perl"
 makedepends="perl-dev"
 checkdepends="perl-test-warn"
@@ -17,12 +17,12 @@ builddir="$srcdir"/$_pkgname-$pkgver
 
 prepare() {
 	default_prepare
-	export CFLAGS=`perl -MConfig -E 'say $Config{ccflags}'`
+	export CFLAGS=$(perl -MConfig -E 'say $Config{ccflags}')
 	PERL_MM_USE_DEFAULT=1 perl Makefile.PL INSTALLDIRS=vendor
 }
 
 build() {
-	export CFLAGS=`perl -MConfig -E 'say $Config{ccflags}'`
+	export CFLAGS=$(perl -MConfig -E 'say $Config{ccflags}')
 	make
 }