You could replace all the commands in package() with the following single command:
install -D "$srcdir/ExportToLaTeX.dll' \
"$pkgdir/usr/lib/tomboy/addins/ExportToLaTeX.dll"
Also, the AUR might not accept the package without a build function.
I'm not sure if this has been fixed, but if you get a submission error
try adding:
build() {
true
}
above the package function.
