Add missing python-lxml make/optdepends

Signed-off-by: Christopher Arndt <chris@chrisarndt.de>

.SRCINFO

@@ -12,10 +12,12 @@ pkgbase = lv2-git
 	makedepends = gtk2
 	makedepends = libsndfile
 	makedepends = pygmentize
+	makedepends = python-lxml
 	makedepends = python-pygments
 	makedepends = python-rdflib
 	optdepends = libsndfile: example sampler plugin
 	optdepends = gtk2: example scope plugin
+	optdepends = python-lxml: for lv2specgen.py
 	optdepends = python-pygments: for lv2specgen.py
 	optdepends = python-rdflib: for lv2specgen.py
 	provides = lv2

.gitignore

@@ -2,7 +2,8 @@ autowaf/
 lv2/
 src/
 pkg/
-lv2-git-*.tar.xz
+lv2-git-*.pkg.tar.xz
+lv2-git-*.pkg.tar.zst
 lv2-git-*.src.tar.gz
 .AURINFO
 

PKGBUILD

@@ -10,9 +10,10 @@ arch=('i686' 'x86_64')
 url="http://lv2plug.in/"
 license=('custom:ISC')
 makedepends=('asciidoc' 'doxygen' 'git' 'gtk2' 'libsndfile' 'pygmentize'
-             'python-pygments' 'python-rdflib')
+             'python-lxml' 'python-pygments' 'python-rdflib')
 optdepends=('libsndfile: example sampler plugin'
             'gtk2: example scope plugin'
+            'python-lxml: for lv2specgen.py'
             'python-pygments: for lv2specgen.py'
             'python-rdflib: for lv2specgen.py')
 provides=("${_pkgname}" "${_pkgname}=${pkgver//.r*/}" 'lv2core' "${_pkgname}-svn")