added the PKGBuild to the repo

.SRCINFO

@@ -0,0 +1,23 @@
+pkgbase = pdf-sign
+	pkgdesc = Simple tool to sign PDFs using an saved signature
+	pkgver = 1.0
+	pkgrel = 1
+	url = https://github.com/svenssonaxel/pdf-sign
+	arch = x86_64
+	license = MIT
+	depends = ghostscript
+	depends = python
+	depends = qpdf
+	depends = poppler
+	optdepends = tk: for interactive usage
+	optdepends = pdftk: an alterative tool to process PDF for qpdf
+	source = pdf-create-empty
+	source = pdf-from-text
+	source = pdf-sign
+	source = empty-3inx2in.pdf
+	sha256sums = d6b3bd23a3fcf28561e152690332738babf5e71afde40e5727c643a5805ae76b
+	sha256sums = 4a509aa3e787c3e617f151bcd25dd93adf9af3af477562c64988f7784395d40d
+	sha256sums = 7b52792ead60257c57f4a12d727a882936f24b9cb3ae57d73beb90cdd7960707
+	sha256sums = a2fd2476c1d8364853c2382a8090d8fbc2f11fb4a535714e27a3069ce009eef3
+
+pkgname = pdf-sign

PKGBUILD

@@ -0,0 +1,39 @@
+# Maintainer: Sebastian Tobie <archlinux@sebastian-tobie.de>
+# based on the PKGBUILD of sulis
+
+pkgname=pdf-sign
+pkgver=1.0
+pkgrel=1
+pkgdesc='Simple tool to sign PDFs using an saved signature'
+arch=('x86_64')
+url='https://github.com/svenssonaxel/pdf-sign'
+license=('MIT')
+depends=(
+    'ghostscript'
+    'python'
+    'qpdf'
+    'poppler'
+)
+optdepends=(
+    'tk: for interactive usage'
+    'pdftk: an alterative tool to process PDF for qpdf'
+)
+source=(
+    'pdf-create-empty'
+    'pdf-from-text'
+    'pdf-sign'
+    'empty-3inx2in.pdf'
+)
+sha256sums=(
+    'd6b3bd23a3fcf28561e152690332738babf5e71afde40e5727c643a5805ae76b'
+    '4a509aa3e787c3e617f151bcd25dd93adf9af3af477562c64988f7784395d40d'
+    '7b52792ead60257c57f4a12d727a882936f24b9cb3ae57d73beb90cdd7960707'
+    'a2fd2476c1d8364853c2382a8090d8fbc2f11fb4a535714e27a3069ce009eef3'
+)
+
+package() {
+    install -Dm755 -T pdf-create-empty "${pkgdir}/usr/bin/pdf-create-empty"
+    install -Dm755 -T pdf-from-text "${pkgdir}/usr/bin/pdf-from-text"
+    install -Dm755 -T pdf-sign "${pkgdir}/usr/bin/pdf-sign"
+    install -Dm644 -T empty-3inx2in.pdf "${pkgdir}/usr/share/doc/pdf-sign/examples/empty-3inx2in.pdf"
+}