main/wireshark: use bash during build

fixes:
mkdir -p /home/buildozer/aports/main/wireshark/pkg/wireshark/usr/share/{mime/packages,applications}
install -m 644 ./wireshark-mime-package.xml /home/buildozer/aports/main/wireshark/pkg/wireshark/usr/share/mime/packages/wireshark.xml
install: can't create '/home/buildozer/aports/main/wireshark/pkg/wireshark/usr/share/mime/packages/wireshark.xml': No such file or directory