dev-libs/libxslt: Add DEPEND on virtual/pkgconfig.

This fixes a breakage on ToT.

Pull request: https://github.com/gentoo/gentoo/pull/16976

BUG=chromium:1113478
TEST=./update_chroot

Change-Id: I5dc8fecd86cf1ebc52706bc4ff0cd0f47ab65d53
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2340390
Commit-Queue: Allen Webb <allenwebb@google.com>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Allen Webb <allenwebb@google.com>
Auto-Submit: Allen Webb <allenwebb@google.com>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
diff --git a/dev-libs/libxslt/libxslt-1.1.34-r1.ebuild b/dev-libs/libxslt/libxslt-1.1.34-r1.ebuild
new file mode 120000
index 0000000..ceef441
--- /dev/null
+++ b/dev-libs/libxslt/libxslt-1.1.34-r1.ebuild
@@ -0,0 +1 @@
+libxslt-1.1.34.ebuild
\ No newline at end of file
diff --git a/dev-libs/libxslt/libxslt-1.1.34.ebuild b/dev-libs/libxslt/libxslt-1.1.34.ebuild
index 305218a..aad93bd 100644
--- a/dev-libs/libxslt/libxslt-1.1.34.ebuild
+++ b/dev-libs/libxslt/libxslt-1.1.34.ebuild
@@ -27,7 +27,9 @@
 		dev-libs/libxml2:2[python,${PYTHON_USEDEP}]
 	)
 "
-DEPEND="${RDEPEND}"
+DEPEND="${RDEPEND}
+	virtual/pkgconfig
+"
 
 MULTILIB_CHOST_TOOLS=(
 	/usr/bin/xslt-config