texlive: create libsynctex sub-package.

Other packages can link against this library, and they don't need to
pull in the whole texlive package.

[ci skip]

Closes: #24300 [via git-merge-pr]

common/shlibs

@@ -3972,6 +3972,7 @@ libkpathsea.so.6 texlive-20200406_1
 libtexluajit.so.2 texlive-LuaTeX-20200406_1
 libtexlua53.so.5 texlive-LuaTeX-20200406_1
 libptexenc.so.1 texlive-20200406_1
+libsynctex.so.2 libsynctex-20200406_3
 libdolphinvcs.so.5 dolphin-20.04.3_1
 libcglm.so.0 cglm-0.7.6_1
 libfcft.so.3 fcft-2.2.2_1

srcpkgs/libsynctex

@@ -0,0 +1 @@
+texlive

srcpkgs/texlive/template

@@ -338,6 +338,13 @@ texlive-Xdvi_package() {
 	}
 }
 
+libsynctex_package() {
+	short_desc+=" - libsynctex"
+	pkg_install() {
+		vmove "usr/lib/libsynctex.so.*"
+	}
+}
+
 texlive-devel_package() {
 	depends="${sourcepkg}>=${version}_${revision}"
 	short_desc+=" - development files"