community/bcc: use python3 as the interpreter for bcc-tools

Update tools to use /usr/bin/python3 as the interpreter.

community/bcc/APKBUILD

 # Maintainer: Adam Jensen <acjensen@gmail.com>
 pkgname=bcc
 pkgver=0.15.0
-pkgrel=0
+pkgrel=1
 pkgdesc="A toolkit for creating efficient kernel tracing and manipulation programs"
 url="https://github.com/iovisor/bcc/"
 arch="all !s390x !mips !mips64" # build fails
@@ -59,6 +59,8 @@ _tools() {
 	mkdir -p "$subpkgdir"/usr/share/bcc
 	mv "$pkgdir"/usr/share/bcc/tools "$subpkgdir"/usr/share/bcc
 	mv "$pkgdir"/usr/share/bcc/introspection "$subpkgdir"/usr/share/bcc
+	find "$subpkgdir"/usr/share/bcc/tools -type f -exec \
+		sed -ie "s/^#!\/usr\/bin\/python$/#!\/usr\/bin\/python3/" \{\} \;
 }
 
 _py() {